Nifty foliage perennial that can double as a terrestrial border plant (with regular water in rich, moisture-retentive soil) or submerged as a border perennial in a water pot or the edge of the pond. The majority of the spikey 3′ tall leaves are composed of cream/ivory streaks with dramatic stripes of deep green. The effect is ghostly and vivid from quite a distance away. Forms large spreading clumps in time. To 4′ wide when things are going well. Full sun to part shade. Flowers are not very conspicuous spikes that hide within the foliage. Completely winter deciduous- this is nice, it makes cleaning up in late winter/spring easy and and no fuss and the plant begins anew and fresh each season. Not bothered by pests. If sunk in a pond or water pot use heavy clay soil- like from the ground and mulch with a layer of gravel. Long lived plant. High deer resistance. AKA. Ghost Sweet Flag.
Biome: Mesic
A mesic biome is one that enjoys a fairly constant supply of moisture. Some natural examples include riparian areas or streamsides, the edges of lakes or ponds, and springs and seeps. Irrigation, of course, can turn an otherwise summer-dry area into an effectively mesic biome. A true mesic plant does not handle drought stress at all, instead of wilting they often go straight to crispy. Simply lacking the mechanisms that conserve moisture for xeric plants. Liberal mulch and deep, rich, moisture retentive soil amended with compost all combine to make life easier for the gardener as well as plants. Group water loving mesic plants together to more efficiently irrigate. You’ll save time and water.
Climate Adapted Plants for Gardeners in the PNW
Acorus gramineus ‘Golden Lion’
Is this the best form of golden sweet flag or what? We love the vivid yellow leaves on a dense and arching evergold perennial. Clumps densely but the foliage is born in fans and spreads out. To only 6″ tall but spreading to 1′ wide. Best in part shade and either permanently wet sites or regular consistent water. Mine makes a happy home on the north side of my house at the base of the rain gutter. Plenty of water in winter- and I don’t forget to water it in summer. Good appearance year round. In spring little off-white spikes serve as flowers. Native to permanently wet sites. Give it a bit of shade. Moderately deer resistant.
Adiantum aleuticum
Western Maiden Hair Fern is native from the Aleutian Islands in Alaska south mainly through shady wet spots in the west south as far as Chiahuahua, Mexico. Its even locally native from Maryland to New Foundland. Its a long lived and vigorous fully deciduous perennial for perpetually wet sites. To 2′ tall and spreading almost indefinitely where conditions suite it. Heavy clay soil that retains consistent moisture in part shade to shade. Often found lining water falls in Oregon or in deep cool moist gullies. The multi fingered leaves are a soft green and are held erect on jet black stems. Very good sited at the bottom of a downspout. Very easy to grow given consistent moisture. Oregon native plant.
Adiantum venustum
Himalayan Maidenhair fern is one of our favorite groundcovers for shade and rich, moist soil. The divided fronds in the shape of an arrow are always soft and fresh. In spring this deciduous variety emerges with tones of amber and soft pink before taking on a mature soft green hue. These delicate leaflets are held on thin, wiry black stems to 10″ tall and it spreads prodigiously to form vast colonies. It doesn’t smother neighboring plants however, instead it seems to just flow around such woodland neighbors as Epimedium, Hellebores, even woodland bulbs like Erythronium. Regular summer water. Avoid hard, compacted dry soils. High deer resistance.
Adiantum x tracyi
Cool hybrid between two California native maidenhair ferns that we love because its EVERGREEN! Finely divided soft green leaflets surprise as they sail through the toughest winter with little or no damage. A clumping variety that slowly increases over time in rich, moisture-retentive soil in part shade to shade. Adores moisture but can go much drier than most maidenhairs. To 10″ tall and as wide – then increasing. Lovely thing that works in woodlands to containers. Excellent naturally-occurring hybrid that deserves a place in our gardens. Moderate deer resistance.
Agapanthus ‘White Profusion’
Born and bred in the PNW this excellent compact and extremely floriferous white flowered Lily-of-the-Nile is a first rate selection. To 20″ tall and forming an expanding but compact clump. Flowers appear for 4-6 weeks in mid-summer. Clear, pristine white with abundant flower spikes- a small amount of leaves supports copious flower spikes- a great attribute of the best Agapanthus. Lots of flowers/few leaves. Full sun to very light shade in rich, well drained soil with regular summer water. Completely winter deciduous. Handsome pale green matte foliage. Long lived perennial. Mix with Blue Agapanthus for contrast. Bloom stems increase markedly with the size of the clump. Our favorite hardy white Lily of the Nile. Agapanthus do best in neutral to alkaline soil. Incorporate a handful of lime in the planting hole.
Agapanthus x ‘Summer Nights’
A northwest raised cold hardy selection with deciduous leaves and the most intense deep blue flower spikes to 28″ tall in June and July. Full sun, well drained soil and regular water. Deciduous Agapanthus (REALLY) appreciate good soil. Combine with other perennials for love, joy. Best with regular summer irrigation and annual applications of organic fertilizer. Has been a long lived, long term performer in landscapes from Vancouver, BC to Medford , Oregon. Selected for intense deep blue flower color combined with excellent hardiness to cold.
Amomyrtus meli
Unusual Myrtle from Chile that I’ve grown for many years and though it is difficult to root from cuttings we still offer it. Glossy small leaves have the distinct fragrance of citrus when bruised. A tall rainforest tree in its home, in my garden it is a columnar evergreen shrub to 8′ x 2′ in 7 years. In early summer it produces clusters of pretty off-white flowers that are lightly fragrant too. They often turn into clusters of black berries by autumn. Slow growing in youth it picks up a little with age. Full sun to part shade in a protected location. Mine is against an east facing wall and it’s never been damaged by cold – save for a few burned tips below 10ºF. Surprising. If you are a collector and you’d like something different give this handsome shrub/tree a try. It will thrive at the Oregon Coast and likely grow much, much bigger. A water loving tree that requires regular irrigation during summer- this encourages growth and lustrous foliage. Chile.
Anemopsis californica
Yerba mansa is a water loving perennial herb that is native in south central Oregon south into California. It comes into our state from the south in Klamath County. There it is found in vernally wet to permanently wet sites. The only member of its genus this plant with large round leathery leaves organized in basal rosettes roams by long runners to colonize large areas. The cheerful flowers appear from late spring into early summer. Excellent perennial for bios wales as it handles inundation and even limited drought. To 5″ tall in the foliage with spikes displaying true flowers on a tall cone surrounded by pure white lower bracts to 14″ tall. This plant performs very well in rich soil with regular summer H20 as well. It has been used as a medicinal herb by both indigenous groups and early settlers. Winter deciduous and cold hardy. Great for sunny stream banks, vernally wet sites, and even containers. Oregon native plant.
Aquilegia longissima ‘Long Spurred’
Stunning columbine native to the American SW that we cherish for its huge flowers trailed by improbably long tails held against blue foliage. Easy to grow late spring bloomer that thrives in many soil types in part shade to full sun with regular summer irrigation. To 14″ tall and becoming a long lived perennial. Winter deciduous. Mix with gold foliaged plants for- a flower color echo. Lovely flower form that hummingbirds and butterflies find delectable. Easy to grow. High deer resistance. Soaring wonderful, whimsical flowers.
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