Tender <sigh> but perhaps the most spectacular variegated Agave. It makes a great container plant for LARGE containers. To 5′ x 5′, it grows a little slower in containers. Make sure it’s sturdy and well built too because this puppy has been known to grow so vigorously as to shatter its own home. Use well drained cactus mix and add a handful of all organic fertilizer. Move to a freeze free environment such as an unheated garage if temperatures threaten to drop below 20ºF. Otherwise move it to a dry place for winter- under a south facing eave is ideal. Move it back out in the open when rain dwindles. Light summer water will speed growth. Leaves on this form are blue on the edges with a dramatic pure white stripe down the center. Wow.
Far and away the easiest Agave to cultivate in our climate and the handsome contorted sage green leaves are free of a deadly spike at the tip. Don’t be fooled, though. The leaves are lined in fine serrations that can cause a cut if you rub your person against them. To 3′ tall and as wide for very well-drained soils in full sun to very light shade. Amend the soil with pumice to sharpen drainage if needed. Ideally adapted to slopes. Good dimensions as a large focal point in a rock garden or clustered into clumps in the gravel bed. Accepts the highest reflected heat. Light summer water speeds growth. Often produces offspring from the base. These can be detached and replanted when its truly warm. Bold mature clumps are breathtaking. Wonderful life in hellstrips. Obviously deer resistant, but the tips can be brittle so handle them with care when planting. Excellent year round appearance and texture.
Agave ovatifolia ‘Frosty Blue’
A real winner in our climate this is perhaps among the easiest bold Agaves to cultivate. Large rosettes of flared deadly leaves are a luminous light blue. The whole rosette can achieve 3′ wide and nearly as tall but smaller is more common. Excellent tolerance of the combination of cold and wet that Agaves mostly despise. This plant also is less prone to injury from necrosis of damage- slugs, snails etc. Full sun to a surprising amount of shade, though you’ll want to avoid the overhead detritus of trees into the rosette. In full sun such as a bare parking strip it revels in heat, exposure and fast drainage. Amend the soil to at least 1/2 pumice and 1/2 virgin native soil. Water to establish then only what falls from the sky. Obviously site away from paths- stab wounds suck, literally. In Mexico they planted large agaves in front of the bedroom windows of their female children. The idea I guess was to deter suitors with bad intentions. But its a neat story and you could see how it would work. Obvious awesome deer resistance. Sometimes called Whale Tongue Agave.
Agave parryi ‘Flagstaff’
From the very far north end of this variable species range in Northern Arizona near—‘Flagstaff’. High elevation form that is found above 7000′ in the wild. Very cold hardy moderately large Agave. Full sun and very well drained soil. You must amend the soil with pumice and gravel to avoid wet accumulating around the crown in winter. This is made all the more easy by placing on a slope. The rosettes should be tilted to shed winter wet. Very stiff and sharply tipped steel blue leaves form a rosette that is at first upright then spreads out a little. Remove leaves from deciduous plants that collect in the rosette in autumn- they blow in from god knows where and leaving them can encourage rot. Excellent in containers. Move containerized plants under an eave or overhang to keep it dry in winter. No water required after initial establishment. Beautiful form of this cold hardy species. High deer resistance.
Agave parryi ssp. couesii
A really pretty pale blue Agave with sharp angular leaves in a remarkably symmetrical rosette with age. Cold hardy and it requires very well drained soil in a hot position. A south facing slope is ideal in soil that has been amended with liberal amounts of pumice and gravel. And you should tilt the rosette so that water does not collect in winter. This variety is a little slower than others. Aside from perfect drainage it requires a little bit of heat and patience. To 20″ tall by 30″ wide in time. Great container subject- make sure the container is sturdy and large enough to accommodate both a spreading primary rosette and prolific pups which crowd the base. In time it can form bold colonies. Move containerized plants to a dry location in winter. Remove deciduous tree leaves that collect in the rosette in autumn to stave off rot. SW U.S. High deer resistance.
Agave parryi ssp. neomexicana
New Mexico Agave is a spike wonder. Much more upright-growing than the species with sharp-tipped leaves that terminate in a blood red thorn. OW. Forms a very symmetrical plant with many leaves of steel blue. Full sun and VERY WELL-DRAINED soil. Excellent on hot slopes where it will tilt the rosette to avoid winter wet. Pups, heh, freely and you will soon have many rosettes. Amend the soil with pumice and gravel. Make sure there is plenty of air in the soil and no place where water could collect. Fantastic specimen plant for a dry garden/gravel garden. Water through the first summer to establish then none in subsequent years. Clean out the rosette when deciduous leaves collect in there- a shop vac works great. The leaves will cause rot when they decompose….so they must go. Great in containers- large, sturdy containers. Cold hardy. High deer resistance.
Agave parryi ssp. truncata
Consistently one of the most successful Agaves for gardens in our region. Soft gray rosettes have leaves with a distinct upright habit. At the tips of the wide leaves is a single (deadly) black thorn. Very nice. Full sun and very well drained soil with little to no summer water when established. This Agave requires soil that is never soggy- amend heavily with pumice and gravel to create air pockets. Plant this (and all) hardy Agaves in our climate on a tilt. The tilted rosette sheds rainwater and it keeps it much drier in winter. Ideally, this Agave should be sited on a hot, south facing slope. In autumn deciduous leaves from (everywhere) seem to blow into the rosette and collect. You must remove these immediately so that they do not rot the center of the plant. A shop vac works wonders…so do bar-B-Q tongs. Excellent in containers. Its best to plant hardy Agaves in early spring to early summer. They require a long season to develop a root system which ensures that they are cold hardy. No root system and not so hardy. Hardy below 0ºF when dry. Highly deer resistant.
Cast Iron Plant. Once you realize how incredibly useful and uniformly good looking this perennial of dry shade is- its as if there has been an awakening. Upright wide then tapered deep green evergreen foliage is famous for its ability to thrive in dust dry black shade. Well, its more adaptable than that. It makes a great evergreen texture, presence in any shady setting. It really does require protection from bright hot sun- it will discolor the leaves and recovery is a long slow process. To 2′ tall and forming a slowly spreading clump to several feet wide in a half dozen years. In summer brown, round flowers resemble pepperoni and appear at soil level. Curious. Well known as a houseplant its time to use it more in our gardens. Containers, sites in dense shade. Great winter appearance. To speed growth plant in enriched, well drained soil and water diligently during the heat of summer. Long lived plant.
Sotol or Desert spoon is an excellent Yucca relative that does amazingly well in our climate given the correct conditions. Native to the northern Chihuahuan Desert of northern Mexico into Arizona and stretching to the east through New Mexico into Texas is where you will find this handsome desert dweller. Rosettes of serrated blue green leaves radiate out in a circular orb. The ends of each leaf become frizzy and add an overall hazy texture to the plant. In time, when happy 9′ spikes erupt from the center and display columns of small white flowers. Very well drained soil in a full, hot position. Excellent on hot, south facing slopes but perfectly at home in the dry gravel garden. Foliage to 3′ x 3′ slowly. Evergreen. Light summer water to establish then none in subsequent years. Great in containers. High deer resistance.
OOKOW. The common name for this wonderful native bulb. A naked lily closely related to Brodiaea. Also, referred to as cluster lily though that isn’t even remotely as fun to say as OOKOW. Stems to 22″ tall support 6 to 15 showy purple flowers clustered at the stem tip. Dry sunny hillsides in clay soils to meadows throughout western Oregon. Its native range goes a bit to the north into Washington and south to central California. This happy bulb spreads to form colonies in time. It will also spread by seed. An integral part of Willamette Valley meadows. Excellent cut flower that lasts a week in a vase. Water to establish when planting from containers. In subsequent years it will rely only on what falls from the sky. in habitat it can be found with native clumping grasses such as Koeleria and Festuca roemeri var. roemeri. Sisyrinchium idahoense is a frequent associate. The flowers do not nod on the stems as other closely related species Smalll grassy foliage appears in early spring and disappears cleanly following bloom. Adapted to heavy clay soils that are wet for 6 months of the year that dries in summer. Full sun. Loved by Hummingbirds and butterflies. Native to the Portland city limits. Oregon native plant.