Aeonium 'Cyclops'giant red aeonium
Reddish-bronze leaves with a green “eye” in the center are a standout on this large aeonium, to 4-5 ft tall and 3-4 ft wide. A cross between the darker A. ‘Zwartkop’ and the more wavy leaved A. undulatum, these succulents are cold hardy to 25F, USDA zone 9b, so best in pots or a very! protected area. Well-drained soil in sun or shade with little water for plants in the ground, a bit more in containers.
Aeonium 'Jolly Green'
Jolly green indeed! A low-growing succulent that remains under 1 ft tall x 1-2 ft wide -- wider over time, with multiple green rosettes, each 8-10" wide. Pale, greenish yellow flowers cluster among the leaves in summer. Sun and well-drained soil is best with little water required in summer and almost none in winter. Frost hardy to 25F, USDA zone 9b, so, where temperatures drop lower, best in containers with winter protection.
Aeonium 'Strybing Red'
Another sedum relative, this with 4" rosettes of slightly toothed leaves that turn deep red in winter or in bright light. Forms clumps to 18" wide. Where temperatures don't drop below 25F and plants can be protected from freezing, these are fine in the garden. Otherwise best in pots that winter indoors or in a very! protected garden area. Well-drained soil in sun or shade with little water for plants in the ground, a bit more in containers. Frost hardy to 25F, mid USDA zone 9.
Very popular, shrub forming, sedum relative from the Canary Islands with rosettes of nearly black leaves on gray-brown stems rising to 3-4 ft. Yellow, star-shaped flowers appear in clusters in late winter and early spring on mature plants. For sunny coastal areas or part shade inland with occasional but deep summer water. Frost hardy to the mid 20s F, mid USDA zone 9, and a superb container plant to bring inside to a bright spot where temperatures drop lower. Also found as A. arboreum 'Zwartkop' and occasionally as A. manriqueorum 'Schwartzkopf'.
Aeonium arboreum 'Variegatum'
This sedum relative has a branching growth habit producing compact, variegated, succulent rosettes to approximately 12" tall. Prefers full to part sun, well-drained soil, and occasional water, especially during the growing season. Excellent as a container plant that can be brought inside if temperatures fall below the upper 20’s F. Frost hardy to mid USDA zone 9.
Aeonium canariensecanary island aeonium
Another wonderful succulent for the gardener’s palette. Growing up to 3 ft tall and wide, this rosette-forming plant does very well in the garden where temperatures don't drop below 25F, mid USDA zone 9, and plants are protected from freezing. Otherwise, best in pots or as a temporary garden display. Does best in sun with sheltering from hottest afternoon rays and a bit of summer water now and again. Too cool!
Aeonium canariense var. virgineum
From the Canary Islands, this virgin aeonium probably won't flower for you, but its pale green, aromatic rosettes of fuzzy, 8" leaves are very satisfying. Full to part sun with occasional summer water. Frost hardy to about 20F or so, the bottom of USDA zone 9, so best used as a container plant where temperatures are harsher and kept indoors in a bright but cool place with occasional water in winter.
Aeonium domesticum 'Variegatum'
Compact evergreen succulent with loosely held rosettes on short stems, the succulent green leaves variegated in creamy white to yellow. Bright yellow flowers appear in summer. To only 12" tall. Prefers well-drained and lean soil and, during the winter growing season, bright light and regular water. In summer keep cool and shaded with occasional careful water. Frost hardy in USDA zone 9b; protect below 30F. Cheeerful container plant.
Open rosettes, to 3-4" wide, of bluish green leaves with red edges top this multi-branched shrub from the Canary Islands. To up to 2 ft tall and wide, with late spring flowers of pale yellow to white that rise above the foliage. Full sun to light shade on the coast or light to full shade inland. Prefers well-drained soil and little to no summer water. Frost hardy to 20F, USDA zone 9 so, where winter temperatures are colder, best in a pot with winter protection.
Stems to 3 ft tall hold rosettes 8” across with bright green leaves that ...yes...undulate on the edges. Yellow flowers emerge from the center of the rosette. Sun to part shade with normal water. Only frost hardy to USDA zone 9, so best in pots that can be protected when temperatures drop below freezing.
Agave 'Blue Glow'
Handsome, small agave, its stiff leaves -- to 1-1.5" wide and blue-green with red margins edged in yellow and a red terminal spine -- are particularly lovely when backlit. Plants are small, only 1-2 ft tall and wide at maturity. This hybrid between A. ocahui and A. attenuata was created by Kelly Griffin. It is solitary, enjoying full sun, good drainage, and little summer water. Frost hardy to at least 15F, mid USDA zone 8, with good drainage, of course, and possibly lower.
Agave 'Burnt Burgundy'century plant
Probable hybrid of A. victoriae-reginae and A. pelona from Gregg Star who chose it for its unusual, smooth, burgundy-tinted leaves with dark margins. Plants are small, to only 1 ft to 18" tall, and slowly form clumps to expand their presence in full to part sun and lean, well-drained soil. Frost hardy so far to a little under 20F, just below USDA zone 9, in our now Eucalyptus-shaded agave patch, but a fine pot specimen in colder climates. (Eucalyptus mulch optional.)
Agave 'Kissho Kan'lucky crown century plant
Stunning blue-gray leaves edged in white make this symmetrical rosette an outstanding addition to any collection. Yellow leaf spines darken to reddish brown adding distinction. To 15” tall x 18” wide and slowly offsetting. Needs light, and well-drained soil. Frost hardy to 20F, USDA zone 9. Best in container protected from winter wet where temperatures drop into the teens F or sit in the low 20s.
Agave 'Ruth Bancroft'shark skin agave
Found in the hills near Saltillo, Coahuila, Mexico, where 3 century plants converge (perhaps collide). This selection, from the California garden of Ruth Bancroft, has an exquisitely fine, platinum-colored sheen with no white markings, clearly showing its A. victoria-reginae and A. scabra parentage. To 2-3 ft tall x 3-4 ft wide. For bright sun and well-drained soil with little summer irrigation necessary. Great in containers. Cold hardy to 10F or so, USDA zone 8. Also known as A. ‘Sharkskin’ for its leaf color and texture.
Agave aff. macroculmis T73-99
These, from the mountains of Tamaulipas in Nuevo Leon, Mexico at 7120 ft, are almost undoubtably a stable hybrid between A. montana or possibly A. gentryi - both high mountain dwellers - and A. scabra as it sneaks up toward the passes. Light-blue leaves, deeply dentate, form rosettes to 3ft. Tolerates moderate shade if well drained, otherwise full sun. Frost hardy to 15F, mid USDA zone 8, possibly below 10F if kept dry in winter.
Agave americana 'Cornelius'
Miniature form of the monstrous century plant, forming rosettes to under 2 ft, each leaf centered green with pleasing cream to gold leaf margins. In stunted form gives whole plant the appearance of a star. Frost hardy to upper USDA zone 8 or a bit colder if dry and under an the eaves or another protected spot in winter. Either way a fabulous pot plant. Full sun.
Agave americana 'Mediopicta 'Dwarf Alba''dwarf white-striped century plant
Beautifully variegated, diminutive form spreading to no more than 2-3 ft, with rosettes of beautifully curved leaves colored a dusty blue-green with a wide creamy stripe in the center. Slowly offsets in bright light and well-drained soil with occasional summer water but lovely as a single plant. As luck would have it, this form is hardier to frost that many, with plants surviving 10 to 15F, USDA zone 8, in soil that is dry in winter. Pull in or cover below 20F or so in areas of winter wet.
Agave americana 'No-Po'
Agave americana 'Opal'opal century plant
A variegated agave from the larger group often just called Marginata’ or ‘Variegata,’ this one most pleasingly variegated in creamy yellow on upright, blue-green foliage with sharp spines. To 4-5 ft tall and wide. Shared with us by plantsman Tony Avent as having been hardy in coastal Virginia. Though it has been nuked in North Carolina below 10F with winter moisture, it does show promise as being one of the tougher of the americana group as a very similar plant has grown unharmed in Portland gardens for a number of years. We expect at least 15F, mid USDA zone 8, and possibly lower if winter dry. In any zone a striking pot or container plant. Sun, well-drained soil, and little summer water.
Agave bracteosaspider agave
Looking more like a bromeliad, this agave’s lax, spineless leaves are very choice. Polycarpic and rare in cultivation, these plants are found clinging to the high rocky mountains between Saltillo and Monterey in northeastern Mexico growing with pines and, yes, even Douglas fir and they love the cool summer nights of the Northwest. Slow growing, each rosette to 1 ft tall x 18" wide, gradually forming a wider clump. Sun to part shade in well drained soil with occasional summer water. Frost hardy to 10F, USDA zone 8, when kept dry in winter.
Agave funkiana 'Blue Haze'
Selected for its striking foliage, the powdery leaves toothed and narrowing to a sharply pointed tip with a pale to nearly white mid-stripe. Rosettes can reach up to 2 ft tall and wide. Sun and well-drained soil required. Drought tolerant but occasional summer water speeds growth and generally enhances the appearance. Frost hardy to 15F, mid USDA zone 8. Otherwise a happy container plant.
Agave funkiana 'Fatal Attraction'
Another selection of the already handsome A. funkiana, this with darker green leaves and and pale green midstripe down the center. Leaves are narrow and toothed, ending in a dark and pointed spine tip. For sun and well-drained soil, as one might expect. Drought tolerant but occasional summer water speeds growth. Less frost hardy than the species, to 15F, mid USDA zone 8 if kept dry in winter. Does well in containers.
Agave geminifloratwin-flowered agave
A rare relative in the Agave filifera group, this southwestern Mexico native has intriguing deep green rosettes of rubbery, somewhat weeping leaves with enchanting silver-white filifers toward the center of the rosette. Can even produce a short trunk. A tender species damaged under about 20F, USDA zone 9, it is best in a tall pot where its weeping foliage can spread out and over the rim. When the plants reach 1 ft. or more in diameter, they produce a spike of flowers well over 5 ft tall at which time, hopefully, they also produce an offset or two. Frost hardy in USDA zone 9, these are tender and damaged under 20F.
Agave gentryi 'Jaws'hardy century plant
From an intriguing group in an intriguing and floristically rich part of the world, northeastern Mexico's Sierra La Peña, where three agaves inhabit the upper slopes from 8-9,000 ft, this one now accepted as the species A. gentryi. This selection, made by the Yucca Do boys in the early 1990s, has beautiful gray-green rosettes of sharply pointed leaves with deeply indented leaf margins, double, reddish teeth, and embossed impressions of the older leaves on emerging new growth. Has been very slow to offset. To about 24-36" tall, this selection, found amid pines and oaks in light shade on rubbly limestone outcrops, accepts a myriad of garden conditions but resents wet leaves sitting in the crown. So far, unharmed in upper USDA zone 7 winters.
Agave gentryi x montana
Collected originally in the Sierra Madre Orientale of northeast Mexico in an area where the majestic A. gentryi meets the more refined and smaller A. montana. The beautiful silver-gray color represented here suggests that A. scabra, the universal partygoer of that region, has come along for the ride as well. Fast growing to 4 ft wide, this stunning plant is tolerant of garden moisture -provided drainage is good - and prefers full sun for best color. Cold hardy to 10F, USDA zone 8.
The name A. gracilis applies to a group of plants in northwestern Texas into New Mexico, natural hybrids between A. lecheguilla and A. neomexicana. This forms blue-gray rosettes of narrow leaves with horizontal striping. Rosettes of about 12” make a dense colony if allowed. Bright light and average to gritty, well-drained soil. Collected in the Guadeloupe Mountains in southeastern New Mexico at 6200 ft making frost hardiness probable well into USDA zone 6.
Agave havardianahavard's century plant
One of the best and hardiest agaves, with olive-green or, often, dusty-blue, curving leaves in the classic agave shape. Big, robust, and wickedly spined, usually as a solitary rosette though sometimes with pups. To 2 ft tall and wide. Best with good drainage and full sun. Frost hardy to -10F, USDA zone 6, or lower. Found in Texas, New Mexico, and Coahuila, Mexico.
For the masochists among us, this most intriguing indeed. Extremely sharp and jagged century plant, a narrow endemic of warm southern Mexico look more like a great white shark's tooth than a plant. The blue-green leaves are edged and spined in white. Growing 2 to 3 feet high and wide in full sun. Alas, only frost hardy into the upper 20s, USDA zone 9.9. Best in container protected from winter wet. Fabulous container plant, nowhere near helium balloons.
A tough-as-nails species, closely related to A. parryi but with narrower, deep blue leaves held upright and out and adorned with gray marginal spines and long, terminal brownish red spines. Slow growing to an eventual 1-2 ft tall x 2-3 ft wide, offsetting to form colonies. After 15 years or so, produces yellow flowers on a 12 ft stalk! Full sun and lean, well-drained soil with little, if any, summer water. This native of southeastern New Mexico is one of the hardiest species; tolerating temperatures to -20F, USDA zone 5, with good drainage.
Agave ocahuinerf® spined agave
This symmetrical and architectural century plant from Sonora -- to under 18" to 2 ft with shiny forest-green leaves and cream to mahogany edges -- is underutilized in both garden and container. The flowers stems are quite narrow, to 12 ft or more in height after several years, but it is really the unusual rosette we are after. Our favorite specimen is in a deep brown Chinese urn that reflects the color of the leaf margins. Low to medium nutrients maintain compact growth. This collection, by Greg Starr from one of its northern sites a few miles south of the Arizona border, has been frost hardy to nearly 10F with good drainage. Protect in containers below upper USDA zone 8.
Agave ornithobromamaguey pajarito
Wonderful, short-trunk forming species from subtropical western Mexico, these collections from Sinaloa at under 500 ft elevation -- did we say warm? Closely related to A. geminiflora, the 18" rosettes, with extremely narrow, flexible leaves of dark green, are beautifully framed by a gazillion curly white filifers or hairs. Quite happy with a fair amount of summer moisture; winter drought decreases chance of problems. Full sun to dappled shade, in a bright window, or your nearest lava outcrop. We have had this in our garden, hardy for the last few years with luck. Should be protected below the mid 20s F, so best for mildest parts of the world or as fabulously small-scale container plants. Frost hardy in USDA zone 9.
Agave ovatifoliawhale's tongue agave
One of the most beautiful century plants, found in the Sierra de Lampazos in the early 80s by the late great plantsman, Lynn Lowrey and only named in 2004 by agave-ist Greg Starr. Growing in a limited range of pinyon/juniper/oak country above 8000 ft, the exceedingly wide, beautifully toothed and chalky blue rosettes can reach over 5 ft in width giving the appearance of a much more tropical species. Has proven to be one of the best performers where cold and wet is experienced in winter and has, thus far, proven hardy to 0F, USDA zone 7, or even a bit lower. Sun to dappled shade; drainage is always a plus.
Agave ovatifolia 'Frosty Blue'
whale's tongue agave
A Cistus introduction. This mega-century plant, first discovered by Lynn Lowrey in northeastern Mexico some 30 years ago and just named recently by agaveist Greg Starr, might be the largest of the cold hardy agaves, reaching eventually to 6-8 ft with beautifully formed, blue leaves. Our selection, made from a more recent batch, has a distinct, pale aquamarine hue with the classically shaped leaves, cupped, upright, and slightly outward bending. The species has taken the cold and wet of Dallas TX, for instance, so upper USDA zone 7 for cold hardiness; possibly colder in gritty or dry soil. Fabo container plant.
Agave parryi var. huachucensis
From, yes, the Huachuca Mountains in southern Arizona and into northern Sonora, this beautiful gray-blue century plant forms a classic 20-24” artichoke shape, eventually offsetting to form small colonies. From mid-elevation (5-7000 ft) this, though not the most frost hardy of the parryi clan, takes 10 to 15F in stride, mid to upper USDA zone 8, lower if very well drained. Full sun and summer water in Mediterranean areas.
Agave parryi var. huachucensis 'Huachuca Blue'
A Cistus introduction, bluer than its near relation. Our fabulous selection -- from 7000 ft in the Huachuca Mountains in southern Arizona and into northern Sonora -- exhibits particularly steel-blue leaves in the classic 20-24” artichoke shape, eventually offsetting and forming small colonies. Full sun in lean, well-drained soil with occasional summer water in dry climates. Though not the most frost hardy of the A. parryi clan, still takes 10F in stride, USDA zone 8, and lower if very soil is well drained.
Agave parviflora ssp. flexiflora
Another rare plant from southeastern Arizona and further south with small jewel-like rosettes of under 6" consisting deep olive-green leaves marked white with occasional filifers and eventually producing narrow spikes of red-tinged flowers. Occasionally offsetting -- rather than off-putting. For sun and well-drained soil. Accepts average moisture if the soil is well-drained. Frost hardy at 12 to 15F, mid USDA zone 8.
Agave salmiana var. feroxgiant agave
Huge, scary agave, to 4-6 ft tall x 6-12 ft wide over time, with an urn-shaped silhouette made up of foot wide, gray leaves. Originating in Mexico, these are common as accents in gardens with Mediterranean climates, as they rarely flower. Sun, good drainage, and very little summer water is necessary. Cold hardy in USDA zone 9, to 20-25F. Good for containers.
Agave shrevei 'Gigantea-Dentata'
Agave striata - Espadina form
Found in the wilds of northern Mexico, a symmetric plant that clumped in what appeared to be piles of tumbleweeds from a distance. Grows to about 18” x 18” with leaves tinted blue, often tipped purple-pink in full sun. Water sensitive - needs great drainage. Hardy into the upper teens. Sun. Cold hardy to 16F, mid USDA zone 8.
Agave toumeyana var. bellatoumey's century plant
A rare and unusual plant with particularly dense rosettes of narrow, dark green leaves with striking white markings and decorative filifers, or threads, as an added attraction. Extremely compact, each rosette maturing to around 8-9" in diameter. A colonizer from high elevations of central Arizona, this form makes a fine rock garden specimen if excellent drainage and bright light can be maintained. Protect from excess winter moisture. Cold hardy to -10F, USDA zone 6, or below in dry soil.
Beautiful agave from N. Mexico. Olive-green rosette of blunt black-spined leaves marked with wide silvery white striations. Slow growing to 18” tall and wide, offsetting slowly. Rated to 12F , bottom of USDA zone 8; has survived in dry winter places, e.g. Denver, CO, to well below 0F, USDA zone 7 and below. A beautiful pot specimen.
Agave victoriae-reginae 'Porcupine'porcupine queen victoria agave
This selection from Yucca Do Nursery has indeed white-tipped, porcupine quill-like leaves with gentle patterning on a symmetric plant (think of the shape of an artichoke), making it a more dazzling creature than the typical Agave victoriae-reginae. Slow growing but worth the wait. Bright light, good drainage, and, preferably, protection from winter wet. Frost hardy to below 10 to 15F, USDA zone 8, depending on moisture.
Agave weberi 'Arizona Star'
A most fortunate find at Mountain States Nursery of this round, blue-green century plant, to 2 ft, with leaves that are soft for the genus and, in this clone, streaked and edged creamy yellow. Very easy with bright light, good drainage, and occasional summer water. Best kept dry in winter. Vigorous and frost hardy to 15F or so, mid USDA zone 8. Otherwise, a fabulous container plant.
Agave x leopoldii
Compact and architectural century plant, a hybrid cross of A. filifera and A. schidigera brought to us by Yucca Do Nursery, the narrow, slightly curved leaves with a gray-blue-going-green sheen complete with a few stripes and polka dots. Offsets eventually. A most attractive, small container plant, rarely growing more than 18” x 24", and a great addition to the dry or rock garden in a sunny site with gritty soil. Frost hardy in USDA zone 8b, to 15F or so and as low as 10F if protected from overhead moisture.
Aloe 'Brass Hat'
A most wonderful Hummel hybrid with dark bronzy leaves and rosettes forming clumps of 6” to 1 ft adorned throughout the year with brassy orange flowers. The cross, as follows -- A. (A. haworthioides x A. bakeri) x ((A. descoingsii x A. calcairophylla) x A. bakeri) -- seems algebraic and daunting. The plants are not. Alas, frost hardy only to about 25F, mid USDA zone 9, so take precautions. Great container plant. Keep dry in winter.
Very nice, small aloe hybrid, the rough textured leaves opening green with brown spots and maturing to overall brown with hits of green. To 2-4" tall x 6" wide. Best in well drained soil in full to part sun. Frost hardy only to 25F, mid USDA zone 9, so best kept in containers to be moved indoors in winter and allowed to dry a bit before watering. Both heat and drought tolerant in the ground. A nice addition to the succulent collection outdoors or in.
This dramatic upright hybrid to 18" or more sports blue-green leaves, toothed and edged in red as well as coral red flowers. Stalks will branch from the base. Best in warm conditions, i.e. Zone 10, or in containers. Bright light, let dry in winter and between waterings.
Haworthia-like creature from high elevations of South Africa forming rosettes to 5-6” with each leaf spiked and mottled with cream zigzag markings. Slowly offsets, clumping to form wonderful architectural patterns. Dappled to full sun, decent drainage, and summer water where dry. Probably the most cold hardy, non grass-like Aloe, accepting at least 10F, USDA zone 8, and below into upper zone 7 when planted in the ground. Possibly even lower if kept dry in winter.
short leaf aloe
Native to South Africa's Western Cape, this aloe is a bit more cold hardy and moisture hardy than its relatives. A charming addition to the dry garden with its rosettes of fat blue-gray-green leaves with waxy white surfaces and tiny white spines along the edges. The small rosettes, to 6" tall x 1 ft wide, offset over time forming larger clumps decorated in late spring with orange flowers held above the leaves on taller stems. Best in full sun and accepting of both drought and a bit of summer water. Frost hardy to 15-20F, upper USDA zone 8. One of the best for pot culture.
Gorgeous aloe, a Kelly Griffin hybrid and Proven Winners selection, with rosettes of succulent leaves edged in red and spotted in white, eventually reaching 2-4" tall and wide. Best in well drained soil in full to part sun. Frost hardy only to 25F, mid USDA zone 9, so best kept in containers to be moved indoors in winter. Both heat and drought tolerant in the ground. Let potted plants dry a bit before watering. A nice addition to the succulent collection outdoors or in.
Gorgeous aloe hybrid, a Proven Winners selection with rosettes of striking succulent leaves, white-edged with white markings - elongated spots -- on green, eventually reaching 6-8" tall and wide. Best in well drained soil in full to part sun. Frost hardy only to 25F, mid USDA zone 9, so best kept in containers to be moved indoors in winter. Both heat and drought tolerant in the ground. Let potted plants dry a bit before watering. A nice addition to the succulent collection outdoors or in.
Lovely aloe with rosettes of succulent green leaves with pale cross-stripping. Blooms in later winter to early spring with tubular, peachy orange flowers on tall stems. Enjoys full to part sun, good drainage, and occasional water. Frost hardy to 15F, USDA zone 8b with protection from excess winter wet and weather. Can be brought indoors for an easier winter life.
Gorgeous aloe hybrid, a Kelly Griffin and Proven Winners selection with rosettes of succulent leaves spotted white with brown "teeth" on the edges, eventually reaching 8-10" tall by 14" wide. Best in well drained soil in full to part sun. Both heat and drought tolerant in the ground. Frost hardy only to 25F, mid USDA zone 9, so best kept in containers to be moved indoors in winter. Let potted plants dry a bit before watering. A nice addition to the succulent collection outdoors or in.
Aloe sinkatana x peckii
Stunning aloe, the rosettes of pointed leaves variegated in zigzag patterns of green and white with red teeth along the leaf margins. Late summer flowers are in shades of red-orange, gold and yellow. Best in sun but tolerates some shade. Requires lean, well-drained soil and water to establish with little thereafter except in extreme heat or drought. Frost hardy only to the upper 20s F, USDA zone 9b, so best in a pot moved indoors for a winter vacation.
This is a sweet little succulent from South Africa, perfect for windowsill or mixed container or in the rock garden. Small, 3" rosettes of chubby, triangular leaves of green and purple are topped with showy pink-purple flowers in late spring. Give it bright light, well drained soil, and let it dry out between watering. Once thought to be tender, they have proven frost hardy to 0F, USDA zone 7.
Bergeranthus jamesii - cl 2
Ice plant relative from South Africa, to only about 2” tall in clumps to 5-6” wide with succulent, triangular leaves. In summer, bright yellow, daisy-like flowers cover the the plant. Requires very good drainage in lean soil, sun in all but the very hottest climates, and an occasional watering in summer by hose or monsoon. Frost hardy to 0F, USDA zone 7.
Beschorneria aff. yuccoides ssp. dekosteriana - large green
These seedlings from plants originally collected from Mexico’s Tamaulipas State have grown larger than any others we have tried. The succulent, deep green rosettes reach to over 4 ft wide and high and occasional cherry-red and green flower spikes, to upwards of 10 ft, suggest giant hummingbirds hovering just out of sight. Possibly the best attribute of this wonderful plant -- and the whole genus for that matter -- is its agave-like texture coupled with a willingness to grow in medium shade though perfectly at home in full sun in all but the lowest, hottest places. Occasional summer thunder storms, or the equivalent thereof, simulate its mountain forest home. Frost hardy in upper USDA zone 7, having lost its leaves but recovered from around 10F in gardens…not ours, thankfully. (Originally sold as Beschorneria aff. decosteriana - large green; the name now conforming to accepted taxonomy.)
Surprise! These really are the famed saguaro cactus, iconic plant of the southwest, a very young version to be sure with their round bodies and giganto white thorns. But they grow up, very slowly, eventually forming thick stems with 2" thorns on the ribs, and often producing branches that curve upward. Frost hardy to 20F, USDA zone 9, so think of pot culture.
Cistanthe grandiflora 'Bill Teague'
Another form of C. grandiflora, the rosettes of blue-green leaves much bluer in this form given to us and named by Bart O'Brien's from garden in Pomona, California. To about 3 ft across, like the species, a small, succulent, branching shrubs, with cerise flowers on airy stems to 3 ft tall in spring and again in late summer . Best in sun and well-drained soil with little water required. Frost hardy into the mid 20s F, USDA zone 9b for outdoor planting, and a superb "temperennial" or container plant to winter indoors where temperatures dip lower.
Cotyledon orbiculatapig's Ear
A classic succulent with huge rounded blue-gray leaves and bright orange and yellow flowers held on foot high spikes in summer. Easy and fun in containers, and much hardier than they might appear, surviving into the mid teens if kept dry. Full sun to part shade. Hardy to 15F. USDA zone 8b.
Crassula arborescenssilver dollar plant
Striking, red-edged, silver-blue-gray leaves, to 3" long, cluster on thick and fleshy, branching stems to 3 ft tall and possibly taller on this outstanding succulent from South Africa. Though shy to flower, plants can produce pinkish white, star flowers. Effective pruning can produce a charming bonsai or protect against breakage. Bright light is best with lean soil that drains well and water only when soil is dry. Frost hardy to 25F, perhaps a bit lower, USDA zone 9b, and a handsome container plant.
Crassula ovata 'Tricolor'variegated jade plant
Variegated jade plant, the dark green, succulent leaves decorated with creamy white irregular markings. A lovely shrub and slow-growing, reaching only 1 ft tall in several years, in bright light or part shade. Very drought tolerant, needing only occasional water in summer and almost none in winter unless grown in container and requiring a bit more frequent attention. A fine succulent shrub outdoors where temperatures don't drop below freezing, USDA zone 10. Otherwise a happy container plant spending at least the winter months indoors in bright light.
Crassula sarcocaulis 'Ken Aslet'
Shrubby and frost hardy succulent from South Africa, a fast growing and contorted selection to only 1-2 ft tall and wide with narrow, succulent green leaves on fleshy stems that eventually become flattened trunks with peeling bark. Plants are covered in late spring by terminal clusters of pink flowers. Very showy in full sun on the coast or light shade inland where soil is well-drained and watered occasionally. Expected frost hardy to 10F, USDA zone 8. Also happy on a well-lit windowsill indoors.
Cylindropuntia kleiniae - Colorado purple clonecandle cholla
A 4-5 ft shrub with occasional long golden spines on narrow stems, purple flowers, and abundant orange red fruit in autumn, this form shared with us by Marianne Heacock from her Denver Garden many years ago. Plants have performed very well for us both in our garden and at a desert house in eastern Oregon. Makes an excellent container or garden plant for full sun and well-drained soil. Frost hardy to -20F, USDA zone 5.
santa fe cholla
An unusual and rare form of cholla with lovely apricot flowers surrounded by green to brownish red tepals -- the colors variable and exciting. Found just north of Santa Fe, New Mexico, these shrubby creatures, to 3-4 ft tall x 4-5 ft wide, are dense with narrow, multibranched stems, each stem ending in a whorl of joints --all with elongated tubercles and and sharp spines creating a distinctly prickly texture. Blooms in July. Full sun and lean, sandy soil that drains well is best. Drought tolerant but accepts occasional summer water happily. Frost hardy in USDA Zone 5. Has been listed previously as Opuntia imbricata var. viridiflora.
Dasylirion texanumtexas sotol
As the name would imply, this gem of a garden plant is native to west and southern Texas into Mexico and is one of the hardiest of the lot. Deep green rosettes, with small backward pointing spines and attractive golden filifers at the ends of the leaves, eventually form small trunks but are attractive as focal points or repeated rosettes in the garden. As denizens of the southern Great Plains, they love a thunderstorm or two in the summer and don't mind being dry in the winter, though they are tolerant of moisture. Sun to dappled shade, the main problem with dappled shade being dead leaves, not fun to pull out of the center of the plant -- your arm could get stuck that way, as my dad used to say about forbidden things. Reports tell us of frost tolerance up to -20F, USDA zone 5. Wow! Also great container plants.
Dasylirion wheeleriblue sotol, desert spoon
The best known and one of the more spectacular of the genus, these trunk-forming denizens of southeast Arizona to southern New Mexico and south into Sonora can grow as tall as 8 ft with 4-5 ft rosettes of very pretty gray-blue, adorned with small golden teeth and threadlike filifers at the leaf ends. Beautiful when back lit. Not fussy about water or soil though would rather not sit in winter wet. Great container specimens. This high elevation collection from southeastern Arizona should be frost hardy into the 0 to 10F range, USDA zone 7, especially in bright light with good air circulation and very well-drained soil. Said to be deer resistant.
Delosperma 'Fire Spinner'
A new and exciting ice plant found at 6000 ft in South Africa's East Cape and shared with us by Panayoti Kelaidis of the Denver Botanic Garden. It's the flowers that stop people in their tracks, opening in late spring to early summer, the daisy-like flowers with a white eye and orange petals that mature to bright magenta towards the center. Stunning covering a 2" tall x 2 ft wide mat or succulent evergreen leaves. A terrific groundcover for sun and little summer water once established. Frost hardy to -20F, USDA zone 5.
hardy ice plant
South African succulent with fleshy, pointed leaves and bright pink, daisy-like flowers throughout the summer. To only a few inches tall and spreading to form a pleasant mat, often covered completely in flowers during the summer months. Loves sun; requires good drainage, especially during the rainy winter months. Frost hardy to -20F, where dryish in winter or with that excellent drainage. USDA zone 5.
Delosperma dyeriice plant
Most decorative little ice plant from high elevation South Africa, this forming a blue-green mat of 6” x 2 ft or so with most interesting Pepto Bismol pink to orange-red flowers. A lover of year-round rain but able to withstand drought at any time and frost hardy to upper USDA zone 5 if winter dry. Give some overhead protection or extra well-drained soil mix in winter wet climates.
Dudleya lanceolatalanceleaf live-forever
Known as lanceleaf liveforever, this collection from Tim Hannis, taken in the California's San Bernadino Mountains at over 3500 ft, has succulent, narrow and pointed, blue-green leaves and appears in colonies of powder-blue starfish in gravelly spots and outcrops. In summer, clusters of yellow to red flowers appear on stalks to 2 ft tall. Adaptable to various soils but requires good drainage. Accepts droughty conditions as well as abundant water and sun to part shade. So far has been frost hardy to close to 0F, USDA zone 7, with superb drainage and dry summers.
Dyckia 'Naked Lady'
Named for the lack of spines along the leaves, this cross between D. encholirioides x D. brevifolia is a terrestrial bromeliad with sharp-tipped, shiny green, strap-like leaves arranged in rosettes to 1 ft tall and 2 ft wide. Forms colonies rather quickly. In spring, bright orange flowers appear on tall stems. Part sun to bright shade is best with moderate water. Frost hardy to 20F, USDA zone 9. Happy in containers where temperatures drop lower.
Dyckia 'Red Devil'red-leafed dyckia
This, one of the most colorful Dyckia in our collection and a probable hybrid between D. platyphylla and D. leptostachya, grows to 10-15" high and 18" or so wide in reasonable time with elegantly spined rosettes of deep olive green, burnished intense red, more so with more light. Spring and summer flowers are of burnt orange atop 2 ft stalks. One surprise is the reported frost hardiness, with some testimonials to 8F though we'd be a bit skittish there; we're more confident in the mid teens briefly, mid USDA zone 8, probably colder if dry. Fine container plant, a bit slow growing and offsetting so will remain within bounds for some time.
Terrestrial bromeliad with succulent, spidery leaves mottled deep purple and forming rosettes to only about 4.” Flowers are produced in summertime clusters of orangey red. Offsets quickly after flowering. Full sun for best color. We find it best as a pot specimen though would make a good wall or rock garden plant where temperatures seldom drop to 18F, upper USDA zone 8.
This Brazilian native succulent, to 1 ft tall and wide, has blushed red leaves and is often used in hybridizing to add color to new cultivars. Summer flowers are orange on 3 ft spikes standing above the rosette of foliage. Needs sun in lean and well-drained soil with only occasional summer water. Frost hardy to the upper teens F, USDA zone 8b.
Echeveria 'Fleur d'Or'
Medium green rosettes of shiny, closely held leaves hug the ground, reaching only 4" tall but offsetting more quickly than some, producing lots of pups. Flowers are orangey. E. agavoides is a very possible parent of this sweet succulent. Full sun to light shade is best in well-drained soil with careful watering. Frost hardy only into the low twenties F or so, USDA zone 9, but lower if kept dry.
Also known as Green Goddess, this cross, considered a hybrid of E. agavoides & E. harmsii forms rosettes of pointed and fleshy, pale green leaves that add hints of pink in sun or cold. Early spring flowers are pink & yellow. Best in sun to part shade planted in soil that drains well. Water regularly every three to four weeks as pots begin to dry out. Frost hardy to 20F, USDA zone 9 so best in pots where winter temperatures regularly drop below freezing.
Echeveria elegansMexican Snowball
Dense, blue-gray succulent species from Mexico that mounds or spreads slowly in tight colonies. Edges of leaves are slightly pink, producing equally pretty small pink flowers with a yellow tinge. Very handsome and uniform in the garden. More cold hardy than many other echeveria hybrids, this one makes an excellent rock garden or container plant that needs occasional winter protection below 25 degrees. Drought-tolerant. Plant in part to full sun.
Echeveria secunda MK 3406
Powder blue rosettes form clusters to about 18" with nodding, orangey-pink flowers with yellow tips. Very nice. This high elevation collection has been frost hardy so far to as low as 12F! Wahoo! That's almost to the bottom of USDA zone 8. Needs lean, well-drained soil and occasional water, drying out a bit in between. Wonderful in rock garden walls or containers.
morocan sea holly
This handsome foliaged sea holly from Morocco has evergreen basal leaves, marbled and veined in white, and 1 ft spikes of very blue, thistle-like flowers subtended by silvery, spiny bracts in early to mid summer. Easy in full sun or very light shade in any soil. Drought tolerant once established and best left undisturbed to protect the tap root. Frost hardy -20 F, USDA zone 5.
Unidentified faucaria, probably Faucaria felina, the largest species, but nevertheless lovely with it's yellow flowers opening around noon and closing in the afternoon -- as long as they have sun. Succulent leaves are triangular and toothed along the edges (hence the common name of "tiger jaws", held in crowded rosettes. Best with good drainage and lots of light -- a bit of shade where sun is very hot. They enjoy regular water in spring and fall, their growing season and should be kept moderately dry in winter and summer. Not frost hardy in Pacific Northwest winters, but as a USDA zone 9 plant, happy in pots.
Very small component of the South African Aloe family, this the typical “plant” collected by Captain Bayliss himself on the northwestern Cape. Each rosette to only 4,” rugose and tinted burgundy. Orange and green flowers shaped, indeed, like cute little stomachs. Frost hardy to low to mid 20’s, mid USDA zone 9. Otherwise, a fabulous container plant.
Haworthia angustifolia var. liliputana
This South African member of a very large genus is one of the tiniest. A childhood plant -- that is, having been in our/Sean's collection since some time in the early 70s-- that has rosettes of little teeny weeny, pointed leaves, each about the size of a nickel, growing fairly quickly to form 5-6 “ clumps in a few years. A lover of either winter or summer moisture but tolerant of drought any time. The perfect plant for a windowsill or for a miniature container garden -- perhaps in a teeny tiny condo. Good drainage is a must in full light to dappled shade except in the hottest climates. A rock garden plant in USDA zone 9 or above.
A new species described by Greg Star, striking in silhouette and good for use as pot specimen or garden subject. It is possibly the least frost hardy Hesperaloe, receiving some leaf damage below 20F but worth the effort to protect it. Full sun and some summer water for fastest growth.
Hesperaloe funifera x parviflora
Stunning evergreen perennial originally from Mt. States Nursery’s hybridizing, this with more of the size and vigor of H. funifera, the leaves reaching 6 ft, and the lovely peach to coral flower tones and purpling leaves of H. parviflora. Flower stalks rise to 6 ft +, flowering all summer Ohh! Bright light brings out leaf color. Frost hardy into USDA zone 6. Easy to grow with good drainage.
Hesperaloe parviflorafalse red yucca
Extremely frost hardy succulent with dense clumps of leathery, deeply grooved, blue-green leaves, to 3 ft tall and spreading slowly to 5 ft wide, and upright blooming, salmon-pink, fragrant flowers on 10 ft + stalks in late summer. Great for hummingbirds! Evergreen and suited to a difficult situation in sun (or light shade in hottest climates) with no summer irrigation once established. Frost hardy to -20F, USDA zone 5.
Kalanchoe fedtschenkoi lavender scallops
Another wonderful succulent, native to Madagascar (despite the misleading common name of South American air plant) with rounded, fleshy, blue-green leaves, slightly toothed on the edges, held on upright, flowering stems to 2 ft tall, and low growing, sterile stems that root along the ground. Hanging clusters of purple flowers appear in late spring. Best out of direct sun with occasional water during the summer growing season and little in winter. Frost hardy to 25F or so, USDA zone 9b, and a popular container plant where temperatures dip lower.
Kalanchoe tomentosapanda plant, pussy ears
A wooly-leaved succulent, with fat, felty leaves covered in silver-white hairs -- a water conservation adaptation -- giving the plant a foliage a bluish appear except for the tiny brown spots along the bumpy leaf margins. Found in the wild only in Madagasgar, these charming succulents thrive in full sun, lean soil that drains well, and a thorough drying out before being watered. Frost hardy to 25F, mid USDA zone 9 and a fine pot plant to be overwintered indoors where temperatures dip lower.
Lobelia 'Queen Victoria'
Shocking red flowers in profusion adorn this red-bronze foliaged Lobelia. Blooms all summer; a hummingbird's delight. To 3-5 ft tall spreading slowly to form a clump up to 2 ft wide. Likes to be kept reasonably damp but in well-drained soil. Full sun for best color. A die-back perennial, returning in the spring. Frost hardy to -10F, USDA zone 6.
Manfreda 'Macho Mocha'
Possibly a hybrid between Manfreda jaliscana and Agave scabra, this nearly 2 ft plant, from the semi-desert canyons just over the mountains from Monterey, Mexico, boasts deep purple leaves with, indeed, coffee-colored polka dots over the entire plant. For sun, good drainage, and average summer water. Evergreen to 20F and root hardy into the low teens, USDA zone 8.
A Cistus introduction from one of our hybrids between Agave virginica and A. maculosa -- both now changed to Manfreda. Forms stunning rosettes to about 18", with blue-green leaves endearingly adorned with purple spots. Though tolerant of some drought prefers a medium to moist situation. Light shade to full sun. Deciduous at 25F (don't worry, it's supposed to do that.) Cold hardy to -20F, USDA zone 5 or below, if placed in well-drained soil.
Manfreda undulata 'Chocolate Chip'
Brand new and rare cultivar with striking leaves, long and narrow with wavy edges and very densely spotted with ... well, chocolate chips. This form of a Mexican native, selected by Yucca Do Nursery, is small, to 4" tall x 15" wide with leaves about 12" long, and offsets very slowly. Prefers good drainage, protection from the afternoon sun in the hottest places, and occasional summer water. Root hardy in USDA zone 8.
Nolina 'La Siberica' [D07-64]
A Cistus introduction. Selected from seed collected at 8000 ft, in La Siberica, Mexico, this handsome plant, a symmetrical fountain of long, graceful, flowing leaves, eventually develops a trunk up to 6 ft tall. Definitely attracts attention in the Cistus garden. Enjoys full sun and requires very little summer water. Frost hardy to 0F, USDA zone 7.
Nolina texanatexas sacahuista
A bigger, bolder version of the somewhat more common and varied N. microcarpa. This Texas native grows to a bold textured 5 ft with deep green arching leaves and creamy white flower spikes rising to 8 ft or more in spring and summer. Exceedingly drought tolerant but a little summer water would increase its growth rate. Sun to dappled shade. Frost hardy to about 0F, USDA zone 7, or even a little below.
Opuntia 'Achy Breaky'
This complex undoubtedly three way hybrid (O. polyacantha x O. erinaceae v. columbiana x O. fragilis) from the mountains of eastern Oregon (where everyone know things get a little wild) grows only to 6" or so in height and about 3 ft wide, sporting white rust and deep brown spines along with chartreuse and yellow, late spring flowers, and provides interest in both texture and compactness. As is true for one of its parents, O. fragilis, the pads easily detach and connect to anyone or thing walking by. Good for sharing with friends; not so great in regions prone to violent shaking. Cactus requirements -- lean soil, good drainage, and little to no summer water. Frost hardy in USDA zone 4.
Opuntia 'Baby Rita'baby rita prickly pear
One of the most beautifully colored forms of the frost hardy cacti, a compact prickly pear to 2 ft, with pads to 3-4" that emerge blue-green often aging to greenish yellow tinted pink -- in this case a natural occurrence that doesn't indicate a lack of fertilizer. Late spring, ruffled flowers add to the palette. A hybrid cross between O. santa-rita and O. basilaris, this has all the charm of O. santa-rita in a much smaller plant. Full sun with sharp drainage. Frost hardy to -10F, USDA zone 6. Great in containers.
Opuntia 'Candelaria Flame'
A Cistus introduction, from a most variable population in south central Nevada where these shaggy creatures can vary from gold to white to silver to red. Named for both the nearby small town and the color of its sign, this form of Opuntia erinacea var. ursina 'Candelaria' stood out after an October rain with its brilliant auburn spines exquisitely back-lit in the autumn sun. Slow to reproduce, adding only a pad or two at a time. These enjoy sharp drainage in full sun avoiding overly saturated winter soil. A very long lasting pot specimen. Frost hardy to -10F, USDA zone 5.
Opuntia 'Cyclops'cyclops prickly pear
Though the name has been around a long time, this plant's origins are unclear We do know this is a cute little prickly pear to 1 ft or 18" in height, probably having O. macrorhiza in its ancestry, with rounded pads of 4-6" forming tight clusters with dark bunches of spines appearing as polka dots from a distance. Cheery yellow flowers appear in mid to late spring. Good for container or sunny garden. And, as one would expect, very drought tolerant though west of the Sierra or Cascades would like a drink from the hose once in a while to spur growth. Frost hardy to -30F, USDA zone 4.
Opuntia 'Golden Globe'
A Cistus introduction. From one of our favorite cactus habitats not far north of the aptly named Cactus Mountain Oregon, we believe actually named for particularly large specimens of pediocactus growing on its flanks. This selection from an obviously hybrid colony (parents = Opuntia polyacantha x erinacea var. columbiana) has shaggy upright pads to about 5" creating clumps 8-10" high by 3-4 ft wide with densely petalled flowers of undulating gold yellow, the orange stamens combining to create quite a show. Careful drainage is a must with these cliff dwellers and full sun. More summer drought tolerant than other prickly pears. Probably frost hardy to -30F, USDA zone 4.
Opuntia 'Peach Chiffon'
A wonderful new strain of prickly pear with a profusion of silky, peach colored flowers in June on very compact plants, to under 6" tall forming clumps to 30” wide. n extremely prickly creature for full sun to light shade in well-drained soil. Drought tolerant but happily accepts occasional water. Frost hardy to -30F, USDA zone 4.
Opuntia 'Red Gem'prickly pear
A gorgeous little prickly pear given to us by Colorado's Kelly Grummons and we could find no better description than this with hopefully enough credit due: "An apparent hybrid between O. basilaris or O. aurea with O. fragilis! To 4" high x 18" wide, with small, round, 2-3" wide pads that have very short spines and are fragile (pads break off easily). The petite, deep pinkish red flowers in June are abundant. Beautiful in the rock garden or in containers. Fergusen thinks this MAY be Opuntia polyacantha v. schweriniana … still a mystery." Frost hardy to -30, USDA Zone 4.
Opuntia aurea 'Coombes Winter Glow'creeping beavertail cactus
Old opuntia selection that is very hardy but, for unknown reasons, now much harder to find. We like it for the unassuming green pads that turn dark red-purple to nearly black in cold weather. To 2 ft tall and up to 3 ft wide with cerise flowers appearing in June. Tough and easy in lean, well-drained soil with lots of sun and little summer water. Frost hardy to -30F, USDA zone 4.
Opuntia aurea 'Golden Carpet'
A spineless form of the creeping beavertail shared with us by Kelly Grummons, with upright blue-gray pads with tiny glochids forming chains across sandy areas in its native habitat, making it particularly attractive in both rock gardens and containers. Bright yellow flowers are one of the earliest to appear and one of the last to finish of all species. A variety that always draws a great deal of attention. Often reblooms in July. To 6" high x 36" wide. Frost hardy in USDA Zone 5.
Opuntia basilaris 'Peachy'beavertail cactus
This beavertail cactus, a native from the Mohave desert of California into northern Sonora, was given to us from an old Albuquerque garden and has been one of the best performers. Attractive clumps, from 3-4 ft wide and 18” in height, with 6” pads of powdery blue-tinted-pink, burgundy in winter, and, indeed, peachy pink flowers in spring and early summer. Though a clone more tolerant of garden water, they still prefer well-drained, gritty soil, especially where winters are wet …and an occasional thunderstorm, artificial or not, in dry summer climates. Frost hardy to -30F, USDA zone 4.
Opuntia basilaris 'Sara's Compact'beavertail cactus
One of many fabulous beavertail cactus selections, this is a lovely semi-dwarf form, reaching an eventual 18” with soft, pinkish-gray pads covered in colorful orange-red glochids -- not to be licked! -- and deep rose flowers. This cultivar was selected by Sara McComb. Plant in full sun in mineral soil where drainage is sharp. Frost hardy to -20F, USDA zone 5.
Opuntia basilaris var. brachyclada 'Mormon Rock'
A Cistus introduction from the vicinity of Mormon Rock in southern California. This tightly clumping small form of beavertail has conical blue pads somewhat more flattened than the typical subspecies indicating a possible hybrid. Whatever the botanical case, each pad is only about 3" wide with well-spaced, bright orange glochids giving the whole plant a very cheery appearance. Nice medium-to-cherry-pink flowers appears in mid spring. Not minding extra winter moisture, these are a bit easier to grow than other beavertails, enjoying full sun. Excellent pot or rock garden plant and frost hardy to -10F, USDA zone 5, probably zone 4.
Opuntia basilaris var. heilii - Type local
Named for botanist Ken Heil and collected from the northeastern population of the beavertail cactus. This clone, found growing in heavy alkaline soil in south central Utah and collected via a single pad years ago by plantsman Tim Hannis, produces dense clusters of blue-bodied plants, rather short on glochids, a good thing! It has been our favorite so far growing robustly and producing abundant, warm pink flowers in late spring. Easy in in the ground or container provided full sun and good drainage. Frost hardy to at least -30F, USDA zone 4.
Opuntia basilaris var. ramosa
This far western Mohavian form of one of our favorite beavertails was found many years ago -- possibly an intermediate between the typical brachyclada form. Unfortunately collectors wiped out the colony seemingly within seconds of its discovery. Though we weren't among the collectors, propagules did get around, so here it is -- a pretty thing with each pad under 3", each one stepped atop another and each clump to about 18" tall. Good in containers or in the dry garden. Frost hardy in USDA zone 5.
Opuntia echinocarpa 'Portal Blonde'wiggin's cholla
Opuntia engelmanii - white spinedengelmanii prickly pear
Originally collected in the highlands of central Arizona, this upright prickly pear, to 5-6 ft high and as wide, has pads up to 8" or more in width/length of a pleasing olive-green with ivory-white central spines and yellow flowers with a tad of orange in age followed by rounded reddish fruit. This clone has adorned Portland gardens for 20 years or more and is one of the finer of the large prickly pears for us. Full sun to dappled shade along with decent drainage. Frost hardy to -20F, USDA zone 5.
Opuntia engelmannii - yellow spined
Opuntia fragilis - dwarf goldendwarf brittle prickly pear
Shared with us by friend Panayoti Kelaidis of Denver, this small mat former, quickly to about 3" high x 18" wide and eventually larger, has 1/2" pads with golden glochids and spines. Shy to flower. Very attractive in troughs, pots, or rock gardens, anywhere a low sun angle can can make the golden spines glow. Cactus conditions required -- sun, lean and well-drained soil, and little summer water. Frost hardy to -30F, USDA zone 4.
Opuntia fragilis - Michigan tiny form
This form, from a population in its far northeastern range, indeed Michigan, was found in wind-exposed outcrops or in mats in the mosses and lichens. Each pad is under 1/2" in length and width, often under 1/4", with a slightly blue cap and not many spines. This little prickly pear is best in bright light and quite water tolerant. Has been frost hardy into USDA zone 3. Good container plant for your artic condo.
Opuntia fragilis - Red Butte
A Tim Hannis collection from a small hill of the same name in Utah. The pads are quite thick, somewhat flattened, to 3" with sturdy golden and white spines. Makes small clumps to about 18" wide. Another very good rock garden, tough or container plant. Frost hardy to at least -30F, USDA zone 4.
Opuntia fragilis 'Little Gray Mound'
Very cold hardy little cactus, to only 3" tall in clumps to 12" wide, with brownish red glochids and pads that turn purple in cold weather. Produces bright yellow flowers in early summer. Tolerates part shade but prefers full sun and good drainage; tolerates drought but enjoys occasional summer water. Cold hardy to -35F, USDA 3b. Also fine in containers.
Opuntia fragilis 'Red N Black'
Very nice version of our native Opuntia, this with striking red and black spines growing to 4-6" tall by 3 ft wide and showing off yellow flowers in late spring. Handsome in the sunny well-drained garden, with occasional, monsoon-like summer water for best appearance. Frost hardy in USDA zone 3.
Opuntia gilvescensoklahoma pancake cactus
A very tidy, upright prickly pear from the Oklahoma panhandle reaching 3 ft or more with nearly spherical pads of light blue adorned with short golden spines and yellow flowers, sometimes rust-centered, followed by fleshy red fruit. Bright sun is best with lean soil and at least decent drainage. Frost hardy to -20F, USDA zone 5, or possibly lower.
Opuntia macrocentra 'Kunzleri'long-spined purplish pricklypear
Named for New Mexico plantsman Horst Kunzler, this short, broad form of a most beautiful prickly pear has bluish pads tinted pink in winter -- each pad at least 6" wide and topped with dark "eyelash" spines -- and yellow, orange-centered flower in mid to late spring. Best with sun and a dryish root run. Frost hardy to -10F, USDA zone 6. Fab container plant.
Opuntia microdasys - white spined
One of Sean’s favorite, early childhood succulents, this one with the same perfectly rounded pads but the glochids are cream to nearly white. Summer flowers are yellow. Full sun or brightest windowsill for best appearance. Though most often grown as a container plant, the species is hardy outdoors to 10F, USDA zone 8, or above.
Opuntia polyacantha 'Citrus Punch'
Another beautiful prickly pear from Colorado's Kelly Grummons, this spreading creature of under 1 ft in height but eventually to 3-4 ft wide has orange and yellow spines and warm apricot flowers darkening with age. Superb in rock gardens or containers and frost hardy to -30F, USDA zone 4 or below. Full sun and sharp drainage.
Opuntia polyacantha 'Imnaha Blue'
A Cistus introduction. A common native of western dry lands, this clone, from northeastern Oregon's Imnaha Canyon, was found weeping several feet off a cliff of red ryolite, the nearly spineless, gray-blue pads appearing almost as if hanging in chains. Assuming not everyone has a cliff, these will form spreading mats to 4-12" tall and up to several feet wide. Early summer flowers are a warm, soft yellow. Ordinary cactus requirements -- sun, lean and well-drained soil, and little or no summer water. Undoubtedly frost hardy into USDA zone 4.
Opuntia polyacantha 'Imnaha Sunset'
A Cistus introduction. A common native of western dry lands, these found in northeastern Oregon's Imnaha Canyon. They have round to oval pads -- from 1-4" long with dense, orange spines (polycantha means "many thorns) up to 2" long -- and form spreading mats to 4-12" tall and up to several feet wide. Early summer flowers are, in this selection, yellow with orange stamens and particularly abundant. Frost hardy at least into USDA zone 4.
Opuntia polyacantha 'Peter Pan'hedgehog prickly pear
Collected by Kelly Grummons in Colorado's Pawnee National Grasslands, this stunning, perpetually juvenile, non-flowering form has pads of 1-3" covered in bright, white spines. Forms a spiny, white carpet to only 3" tall and spreading slowly to up to 2 ft wide. A good selection for rock gardens or troughs in sun and well-drained soil. Drought tolerant. Frost hardy to -40F, USDA zone 3.
Opuntia spinosior - highest elevation formcane cholla
Classic and most attractive cholla, from elevations over 8100 ft in southeastern Arizona's Pinaleño mountains, with tightly held, silver-tinted-pink spines on rounded branches and cherry red flowers in late spring on “shrubs” to about 4 ft -- the entire plant a luscious purple in the colder months of winter with the branchlets handing downward. A beautiful contrast to the greeny yellow fruit. Full sun, good drainage, and, where dry, occasional summer water to boost growth. Frost hardy to -20F, zone 5, possibly a bit lower.
Opuntia strigilmarblefruit prickly pear
Unusual, south Texas native, prickly pear, to 3-4 ft or so,with round, 6" pads, the sharp spines chocolate-brown and evenly spaced. Creamy yellow flowers appear in May or June and produce small fruit that blushes red. Does well in full sun to bright shade, lean and well-drained soil, and little or no summer water. Frost hardy to 10 to 15F, USDA zone 8, more reliable if dry in winter or with excellent drainage. A very good container plant for bright light.
Opuntia whipplei 'Tiny Tim'
A Cistus introduction, but we must thank Tim Hannis for finding this northernmost Utah population of O. whipplei and particularly for this striking clone. These spiny, miniature chollas, reaching only about 6-8" in height but spreading to 6 ft or more, are variable in color with 1-2" long "pads" covered with golden spines. Even these small plants manage to produce a number of yellow-green flowers each spring followed by yellow fruit. A most attractive garden "shrub" or container specimen for sun and decently drained soil. Frost hardy to -30F, USDA zone 4.
Opuntia wrightii - white spine
Small cholla from northern Arizona and adjacent places --perhaps more familiar by its old name and synonym, Opuntia wrightii - white spine, this collection does have white spines rather than the silvery spines of the genus. Tightly held branches form a miniature “tree” to about 3 ft tall. Greeny yellow flowers are abundant in mid spring. Easy to grow in bright light and gritty soil with occasional summer water. Frost hardy to -30F, USDA zone 4. A very good container specimen.
Opuntia x rutila - red/black spines
This so far unnamed hybrid was an early Colorado Plateau collection by plantsman Claude Barr. Stout orange-red and black spines mark pads roughly 3" long, the elongation suggesting parentage by O. polycantha and O. fragilis. Mid spring, yellow flowers fade to apricot. Wonderful for small rock gardens with the usual cactus conditions -- sun, lean and well-drained soil, and little or no summer water. Frost hardy to -30F, USDA zone 4.
Opuntia x rutilia
These seem to be intermediate population between O. polyacantha and the ubiquitous O. fragiis coming from the western Colorado plateau. This very pretty form has 3" or so robust pads, purple tinted and turning much darker in winter, with rust and white spines emerging firey orange. The flowers are medium pink in mid spring. Easy in container or garden given bright light and half-way decent drainage. Probably frost hardy to -40F, USDA zone 3.
Oscularia caulescens - Ruth Bancroft Garden clone
Othonna capensisLittle pickles
Yes, the succulent leaves do look a bit like little pickles, a bit like an ice plant. Evergreen succulent with surprisingly large, daisy-like, yellow flowers from mid spring through autumn. Forms patches 6" tall x 1-3 ft across wherever drainage is great and the light is bright. Likes a bit of summer moisture but prefers to be dryish in winter so....that drainage needs to be good. Easily frost hardy to 20F, USDA zone 9, much colder if dry in winter.
Puya dyckioides SBHMPS 6285
Our collection from northwest Argentina at nearly 10,000 ft. Gracefully arching, very shiny leaves tinted red are stunning growing from a high cliff. Luckily you do not have to hang by your ankles to have this plant. Has flowered for us with rosey red, 2 ft spikes with a celadon blue flower, a color that should not be found in nature. Should be hardy to at least 10 to 15F, mid USDA zone 8, making it one of the toughest bromeliads for garden use. Full sun to dappled shade; good drainage.
A lovely evergreen groundcover for the dry garden, this sedum from Pakistan and Afghanistan, to only 6" tall, forms a spreading carpet of small, succulent, blue-green rosettes. A great texture for the rock garden. Clusters of white flowers appear in mid to late summer. Does well in fertile to poor soil, well-drained of course, in sun to part shade. Drought tolerant once established but accepts summer water as well. Frost hardy to at least -20F, USDA zone 5.
Sedum 'Silver Moon'
This hybrid sedum doubtless involving S. spathulifolium and S. laxum was collected in the days of yore in the rich Klamath country of the southern Siskiyou Mountains by famed succulent enthusiast Helen Payne. Light gray-green rosettes to about 3" spread quickly to form no-fuss mats. Wonderful in sun to light shade as a small-scale groundcover, for a green roof, or, yes, windowsill planter. Zone 5. Prefers summer drought.
Sedum album 'Coral Carpet'
Fast spreading, evergreen ground cover for bright sun and sharply drained soil. Leaves are green with turning red with cold; a nice bicolor texture. Flowers are pinkish white in late spring to early summer. Very drought tolerant and very cold hardy, to USDA zone 4.
One of the best of the southern Asian sedums, to 18” or more in jade-plantesque green mounds that can be thinned to exhibit a tree-like form...otherwise can be used as dense ground cover. Bright yellow flowers. Full sun to part shade; summer water for best appearance. Frost hardy to between 0 and 10F - USDA zone 7.
Sedum dendroideumbush sedum
Tall sedum, earning its common names of bush sedum or tree sedum by reaching to 1-3 ft tall along rooting stems that create a large, ground-covering clump to 3-4 ft wide. Succulent leaves and long and green; flowers are yellow in star-shaped clusters appearing in late winter and early spring. Best in sun to part shade in the well-drained, dry garden preferably in a protected spot. Frost hardy to the mid 20s F, USDA zone 9.
old man's bones sedum
Evergreen succulent with round green leaves that become more maroon in summer and golden summer flowers. Spreads to 4" tall x 18" wide. Native to the Pacific Northwest, these are found in rocky places but tolerate many soil conditions in sun to part shade. Tolerant of dry conditions but grow more quickly with average summer water. Frost hardy to -15F, mid USDA zone 5.
Sedum lineare 'Variegatum'
Bright yellow flowers blanket this evergreen sedum in the later part of summer, but it is mainly prized for its cream and green appearance, which tumbles out of containers and over rock walls to great effect. Height to 12'' and 24-36' in width. This Japanese selection has linear variegation. Best in evenly moist soil without too much direct sun. Shines in a container or planted on slopes. USDA zone 7.
Sedum makinoi 'Limelight'
A bright sedum for SHADE! A vigorous Japanese variety, compact and low growing with yellow flowers in summer and bright foliage forming evergreen mats to 2-4" tall x 12-24" wide. Lime-colored, succulent leaves have bronzy tones in colder weather adding color to any part of the garden. Also good in containers. Morning sun to dappled shade in well-drained soil. Drought tolerant once established -- after the first season. Said to be deer resistant. Frost hardy in USDA zone 6.
Sedum makinoi 'Variegata'
Varegated sedum - bright green foliage with cream colored edges and yellow flowers in summer. Good in containuers as well as the garden. Sun to part sun in well drainged soil. USDA zone 7.
Oregon Stone crop
Little fat leaves in full clumps -- green in summer with red and purple tints in the fall colors or in chilly weather. Yellow flowers in summer. To only a few inches tall and spreading neatly. A littleOregon native to plant in full sun and well drained soil. Frost hardy to -10F, USDA zone 6.
A native of the Western Cascades with blue-green, red tinted leaves forming what appear to be octagonal rosettes, 3-6" in height and spreading indefinitely -- but 3 ft can be expected in a couple of years. The late spring flowers are a pale cream yellow contrasting nicely with the foliage. The more sun the brighter the foliage. For best performance mineral soil and a minimum of summer water at least while temperatures are high. Frost hardy to 10F, USDA zone 6.
A sprawling Mexican sedum with startling orange-yellow flowers in early spring and attractive rosettes of waxy, blue-green foliage throughout the year. Forms patches to 6" tall x 12" wide. Easy in full sun with good drainage and some to little summer water once established. Frost hardy in USDA zone 8. Drapes nicely over the sides of containers.
Pine leaved sedum
A vigorous spreading groundcover for sun to part shade. Great for rock walls, wooded slopes, or containers. A little supplemental summer water will keep this lookng its best in very hot situations. Yellow flowers. Frost hardy to -25F, USDA zone 5b. Said to be deer resistant.
Sedum rupestre 'Aurea'
Pine leaved sedum
A vigorous spreading groundcover with golden-yellow foliage for sun to part shade. Great for rock walls, wooded slopes, or containers. A little supplemental summer water will keep this lookng its best in very hot situations. Yellow flowers. Frost hardy to -25F, USDA zone 5b. Said to be deer resistant.
Sedum spathulifolium 'Cape Blanco'
Northwest native stonecrop with little rosettes of silvery blue, fleshy leaves and, in summer yellow flowers hovering above the mat forming ground cover. Full sun to light shade in well-drained soil with little summer water. 4" tall x 12" wide. Stems root easily, adding more plants. Frost hardy in USDA zone 5.
Sedum spathulifolium 'Purpureum'purple broadleaf stonecrop
Native succulent, forming mats of flat leaves in sweet, little rosettes, the bluish leaves tinged a striking purple in this cultivar, darkening further in winter. To only a few inches tall but spreading to 24" wide. Clusters of yellow flowers are produced in summer. Best in sun in coastal climate and light shade inland, neat and textured ground cover or garden accent. Likes well-drained soil and occasional summer water but tolerates some summer drought. Frost hardy in USDA zone 5.
Sedum spurium 'Dragon's Blood'
Succulent leaves, green with red margins, turn darker red in fall, after the late summer, red flowers have come and gone. Red is the theme here. Fast-growing groundcover for sun, good drainage and little summer water. To only 6" tall but spreading to 2 ft or so. Frost hardy in USDA zone 4.
Sempervivum 'Blue Boy'
Grayish-green leaves flushing lilac in the center on this hardy, rosette-forming succulent for the rock wall, outdoor container, hellstrip, or random little nooks and/or crannies. Offsets quickly. Sun to half shade; sharp drainage. Plenty hardy! USDA zone 4.
Sempervivum 'Rita Jane'
Hardy succulent for the rock wall, outdoor container, hellstrip, or random little nooks and/or crannies, this with rosettes of blue-gray leaves tinged red and gold and edged in purple. For sun to half shade in any soil that drains well. Frost hardy in USDA zone 5.
Blue-grey chalky fingers on vigorous spreading stems. Made famous as part of the floor of the “blue room” at Lotusland. Good to about 25 F, below that you can snap off a few stems to grow on a sunny windowsill for next year. Great in containers. Sun to part sun. Frost hardy to 25F, USDA zone 9b.
Senecio tropaeolifoliusSucculent nasturtium
Here’s an odd little South African member of the daisy family that’s grown primarily for its funny glaucous blue foliage. Yellow flowers emerge in spring and are follwed by puffy white seedheads. Needs sharp drainage. Try it in a container, or in a rock wall (and cross your fingers in a cold Pdx winter). Sun to part sun. Cold hardy in USDA zone 9
x Gasteraloe 'Midnight'
An intergeneric cross between an aloe and a gasteria, by Kelly Griffin of Rancho Soledad Nursery, resulting in a rosette-forming succulent, to 8-12" tall x 1-2 ft wide. The leaves are rough-textured with bitty bumps, dark green with red highlights. Flowers are orange in late winter, early spring. Only successful in the ground in USDA zone 10, but elsewhere, a good pot plant or year round houseplant. Bright light with well-drained soil and little water.
One of the larger hardy yucca, forming a trunk to 5-20 ft.... eventually. A great addition to the garden and fine in a container as well -- easy in both. Leaves are large, to 2 ft, sweeping, and sharply pointed. Mature plants produce spikes of white flowers tinged purple appear in early to mid summer. Full sun to half sun in well-drained soil. Easy. Frost hardy to 0F, USDA zone 7.
Yucca aloifolia 'Blue Boy'spanish bayonet
A plant Sean knew at the Berkeley Botanic garden, now sometimes sold as Y. aloifolia 'Purpurea', with somewhat soft, arching leaves that are green with purplish highlights in summer, turning more red in winter temperatures. Very tropical. To 4-6 ft. Sun to part sun and well-drained, lean soil with only occasional summer water once established. Frost hardy to 15 to 20F, mid USDA zone 8. An outstanding pot plant.
Yucca aloifolia 'Variegata'
variegated spanish bayonet
A long coveted form of this sharp-pointed, spectacular tree yucca, native of the deep Southeast, the variegated forms have long been pass-around only plants because of their difficulty in reproduction. Now there's enough for everyone! 3 ft wide, stacked rosettes on branched trunks -- to 5-8 ft and more -- the creamy white variegations, tinting rosy pink in cold weather, make the plant's outline visible from quite a distance. Full sun to dappled shade providing leaves do not gather in the rosettes and cause rot. Well-drained soil. Supplemental water in dry summer places. Frost hardy in USDA zone 7.
Yucca baccatabanana yucca
This trunk-forming yucca is a knockout in the landscape with curving trunks -- up to 10 per plant -- that snake out and stand up to 8 ft tall. Green leaves are stiff and decorated with longish filifers. Very architectural! In early summer, short flower stalks carry abundant white flowers. Full sun with excellent drainage, and, for best appearance, occasional summer water. Frost hardy to -20F, USDA zone 5 and possibly colder.
Yucca carnerosana - Mexican Collection
A collection from South Neuvo Leon, Mexico, of this widespread tree yucca. To 10 ft or more in the garden with a thick trunk and rigid leaves to over 18" long and graced with curling white hairs along the margins as well as, in this form, a thick ivory colored edge that make the leaves look particularly striking. Best in full sun to only light dappled shade with occasional summer water for best appearance. Frost hardy to 5-10F, mid to upper USDA zone 7, possibly colder with protection.
It has been long thought that many of the tree yuccas of northern Mexico are not frost hardy, but recently many of us rosette-fanciers have discovered their toughness. Yucca faxoniana produces 3-4 ft rosettes of stiff, emerald-green leaves with symmetric, pearly cream to brown filifers adorning each leaf. Quick to form full sized rosettes; slow to build a trunk that eventually reaches to 16 ft or more; and slow to branch. Fastest when given plenty of root room, free draining soil, and some supplemental water in very dry summer places. Excellent container plants. Prefer bright light. Frost hardy in USDA zone 7 with some success in warm zone 6 with excellent drainage and protection from freezing winds.
Yucca filamentosa 'Bright Edge'variegated adam's needle
A handsome yucca, popular for its long, strappy and lax leaves, to 2-3 ft long, green-centered with gold margins and curly threads on the edges. Flowers are very showy, white on flower stalks to 12 ft tall. Excellent as a visual accent with leaf edges that aren’t sharp so it can line a path or border. Lean, well-drained soil in full sun with average summer water for best color, though tolerates some shade and some drought. Definitely frost hardy in USDA zone 7 and reportedly in USDA zone 5.
Yucca filamentosa 'Color Guard'
Amazing, variegated yucca, clumping to 3 ft, with gold-centered green leaves, the gold brightening in summer’s light. And, true to the species name, the foliage is dressed up with curly white filaments. White flowers in spring on 6 ft stalks. Sun, well-drained soil, and occasional deep summer water. Frost hardy in USDA zone 5.
Tree forming yucca and one of the most sculptural, the trunk eventually forming a swollen base and slowly branching. To upwards of 15 ft tall, with 2 ft rosettes of tightly held blue-green leaves covered with delicately intertwining filifers. Fabulous garden or container specimen for full sun and well-drained soil. Happy with summer moisture and winter drought, though quite versatile provided temperatures don't drop below 15F for extended periods. Cold hardy into the mid teens, mid-USDA zone 8; colder with exceptional drainage.
Yucca flaccida 'Gold Stripe'
Discovered in the nursery as a striped sport of Y. flaccida 'Gold Sword', each leaf adorned with very narrow creamy gold and blue green lines. Upright and vigorous to 18" in height and 3 ft or so across with, typically, 4 ft spikes of white flowers, most often in June. Full sun to dappled shade; otherwise extremely tolerant of any conditions thrown at it. Frost hardy in USDA zone 4.
Yucca gloriosa 'Tiny Star'tiny star soapwort
Charming yucca, small and slow growing, to only 18" tall x 3 ft wide eventually, with variegated leaves, creamy yellow edged in green. Fits well into a rock garden. A selection of a southeastern US native, introduced from Japan in the 1970s by plantsman Barry Yinger, this form accepts the usual yucca conditions, sun to light shade, well-drained soil, and occasional water in summer for best appearance. So far, none have been seen to flower. Frost hardy to at least 0F, USDA zone 7.
Yucca gloriosa 'Tricolor'
One of the most useful of the trunk-forming, southeastern US native yuccas found growing from South Carolina all the way around to the Gulf side often within sea spray. With 2-3 ft rosettes of upwardly pointed leaves and trunks as high as 4 ft, this form has foliage variegated with cream and light yellow and infused with pinks especially with winter frost. Tolerant and even fond of average garden water and very long lived in container. Very good focal point for the garden. Has been quite happy and frost hardy to mid USDA zone 7.
One of the most beautiful yucca species, related to Y. rostrata. The 3 ft rosettes atop an eventual 3-8 ft trunk resemble the Australian grass trees, xanthorroea, or a dim version of Dasylirion quadrangularis. Leaves are flattened and somewhat triangular, spring-green to nearly turquoise, and flowers are white on stalks to 3 ft or so above the foliage. Full sun to part shade with good drainage and lean soil. Best with occasional summer water. Found in a few scattered localities, these are from north of Galleana, NL, Mexico, in a most diverse habitat. Though the southern habitat would suggest little frost tolerance, these have so far withstood 5F, mid USDA zone 7.
From semi-arid slopes at mid to high elevations in southern Mexico, this small tree, to 20 ft or so and eventually branching, forms multiple rosettes of blue-green leaves, with evenly spaced, small filifers and outward facing flowers. For sun, lean soil, and dry places but enjoys an occasional summer thunderstorm. Has been unusually tolerant of frost for its southern latitude habitat, being reliable to about 20F, USDA zone 9, and a bit lower if winter dry. Otherwise a particularly nice container plant for many years, appearing like bonsai with its swollen caudex of a trunk.
Large scale species, native to coastal areas of the Southeast and often used in Victorian days in our Portland neighborhoods and elsewhere in warmer parts of the country. Pretty much no-fuss plants and one of the boldest species for colder climates if provided reasonable water in summer in drier places. Each plant can grow from 4-5 ft with 3" wide, weeping leaves of glossy green tinted blue and 4 ft spikes of white flowers, most often in June but possible year round. As the plants form small trunks, some offsetting or branching occurs. Spectacular in containers or in the ground. Reliable in USDA 7; has found success in zone 6.
Probably the most handsome of the hardy yuccas for the Pacific Northwest. Stiff grey-blue leaves form a halo around a slowly elongating trunk. Full sun and well-drained soil for a happy plant. A little summer water for faster growth. Frost hardy in USDA zone 5.
Yucca rostrata - specimen
These lovely creatures were grown from seed (NOT wild collected!). Many of these over 20 years old and hand selected for form and blue color. They have been potted this year and might or might not have begun producing this season’s roots -- if not, no fear, they will soon. All enjoy bright light with decent air circulation and all but the most swampy of garden conditions - so very easy care. Frost hardy to USDA zone 6 and have even resisted lower temperatures than that, but don’t push it. Water occasionally in summer west of the Sierra Cascades.
Yucca rostrata 'Sapphire Skies'
A Cistus introduction. Although Yucca rostrata is one of the most gorgeous species available, and definitely one of our top 500 favorite plants, it is exceedingly slow to reproduce from offsets, seed is difficult to come by, and seedlings vary as to their...blue-osity. Yucca rostrata 'Sapphire Skies' is a selection from one of our collections in the early 90s in northern Mexico, out of a seed batch of stunning blue-leaved plants. Through the magic of tissue culture, we now have a reliable source. These vigorous young plants quickly form a 3 ft, multi-leaved rosette of nearly jade-blue, forming 3 to 4 ft plants in 7 or 8 years under good conditions, eventually to 10 ft or more. Excellent container plants, providing fine architecture, or repeated in the dry garden and looking of dusty blue fireworks from a distance. Particularly beautiful reflected in late afternoon/evening light. Full sun to dappled shade. Not particular about soil, excepting standing water. Some supplemental irrigation in dry summer places. Frost hardy in USDA zone 6 and has been successful in zones 5 including the Denver Botanic Garden (Really!).
Yucca schottii 'Chiricahua High'
schott's yucca, mountain yucca
A Cistus Introduction, our collection from near the summit of the Chiricahua Mts., a hardy yucca with very blue-gray leaves, to 3 ft long and sharply pointed, both stiff and more flexible than other "tree" yuccas. Eventually to 10 ft tall, single-trunked in youth to about 6 ft tall x 4 ft wide, then multi-trunked. Early summer flowers are white on tall stalks. For sun to part shade. An excellent garden species, both very drought tolerant and very frost hardy, accepting temperatures to -10F, USDA zone 6.
Yucca sp. [Tehuacana, Mexico]
A most handsome, trunk-forming yucca from the Mexican state of Puebla, to an eventual 8-10 ft -- possibly more, but none of us will live that long. Narrow, blue-green leaves in abundance make a beautiful and most architectural rosette even before lift-off. Flowers are white tinted rose-pink on slightly leaning towers. Sun, lean soil, and some summer water to boost growth. Frost hardy to 10 to 15 F, low to mid USDA zone 8 if winter dry; otherwise protect below 15F. Fabulous container plant. (Previously sold as Yucca tehuacana, the name under which is was received, we have now substituted a more proper nomenclature.)
Tall yucca, its trunk reaching to 12 ft with stiff bayonet-shaped leaves, to 2” wide and 3 ft long, arranged evenly around the thick trunk. Spectacular by itself but when it grows up, in say 4 to 5 years, a giant flower stalk appears adorned with white flowers. Stunning! Originating in the southwestern United States and in Mexico, these are frost hardy to USDA zone 7.