Plant Type: Annual/Biennial

We love west coast native annuals, Nemophila, Collinsia


Seasonal plants as we call them are also referred to as annuals. Many of the seasonal plants that we grow are actually perennials in warmer climates. We search for the most striking and unique whether for foliage or exotic flowers. They may be grown in mixed containers or bedded out in the ground to add spice to summer borders. We love native annuals that are often overlooked in our gardens. They will often re-seed prolifically with a huge show in spring before setting seed and dying. Completing its life cycle. Willamette Valley native hardy annuals are quickly losing the battle with development and they are so easy, beautiful, and appropriate for our gardens. Succulents are wonderful annuals as well- they require less upkeep and make lower care seasonal containers. We add bi-ennials to this mix because they technically live only 2-3 years. Not all of the annuals we offer are on this page. You’ll have to visit the shop for a surprise or two.

Wild Phlox Collomia grandiflora and Willamette Valley Blue Thimble flower Gilia capitata. are casual on this hillside. We adore our endangered and dwindling hardy native annuals. Climate adapted plants that are best planted in very early spring or sown in September. These plants are critical for native pollinators.

 

 

Climate Adapted Plants for Gardeners in the PNW

Anthriscus 'Ravenswing'

Anthriscus ‘Ravenswing’

Deeply colored foliage and clusters of white umbel flowers combine to give this easy to grow biennial an important place in the garden. The finely divided leaves are almost black but have a bluish hue on the surface that reflects the light in opalescent waves. The first year it produces only this gorgeous foliage. Combine with chartreuse/gold leaved perennials and/or shrubs for excellent contrast. In the second season the foliage extends and masses of pure white umbels wave to 3′ tall above the plant. Light and airy which is cool for a plant with deep, brooding foliage. Self sows prolifically and the seedlings are easy to spot, move, thin, dispatch. Full sun to quite a bit of shade in rich, moisture-retentive soil with light but consistent summer moisture. Excellent in woodlands or sunny borders. It makes a surprisingly good cut flower as well. Umbels…these days its all about umbels. Winter deciduous.

My Favorites

Plant type: ,  |  Sun exposure: , ,
Biome: , ,  |  USDA Hardiness zone: Zn5a -15º to -20ºF
Foliage color:  |  Foliage season:

Anthyllis vulneraria var. coccinea

Anthyllis vulneraria var. coccinea

Kidney Vetch is a playful, short-lived perennial with shocking red flowers that come in clusters much like clover. Low, spreading plant that hugs the ground, all the better to see the piercing red flowers on this form. Seeds prolifically, and the seedlings are both easy to identify as well as move or dispatch. To 3″ tall by 18″ wide, when very happy. Loved by pollinators. Forms a vivid patch of color in the most unlikely places. Seeds germinate in autumn and bloom commences in spring. Excellent little nitrogen-fixing temporary plant for new gardens. Enriches soil in a wonderful way. Light to little summer water.  Mediterranean.

My Favorites

Plant type: ,  |  Sun exposure: ,
Biome: , , ,  |  USDA Hardiness zone: Zn6a -5º to -10ºF
Foliage color:  |  Foliage season:

Asarina scandens 'Sky Blue'

Asarina scandens ‘Sky Blue’

A really interesting and wonderful vine that we grow as an annual but its a perennial in warmer climates and can be here too if you treat it right. Arrow shaped leaves have modified petioles that attach and hoists this climber to 8′ in a single season. A continuous supply of tubular (snapdragon shaped) purple blue flowers with a white throat. Loved by hummers this native of the driest parts of the mediterranean is adapted to being dry in the winter and wet in summer. If wet and saturated the whole vine is only hardy to about 26ºF. However, if the plant is kept dry in the winter it is hardy to MUCH colder. In a former garden I had it planted against the south facing side of my house under the eaves. It was bone dry in winter and to my shock it lived for 7 years with temperatures down to 10ºF. I offer this information as interesting but its a primo delicate vine with beautiful flowers that appear continuously all season which makes a lovely seasonal bower. Great on a tripod, or teutier in containers. Full sun to very light shade in rich, well drained soil. Excellent on spring blooming shrubs that are quiet in summer- its a fine textured plant that will never smother the host. Excellent plant.

My Favorites

Plant type: ,  |  Sun exposure: ,
Biome:  |  USDA Hardiness zone: Zn8b 20º to 15ºF
Foliage color:  |  Foliage season:

Caulanthus inflatus

DESERT CANDLES. This fascinating annual thrills us. Most often seen in the wild in its native California, and is commonly seen in the wildflower mecca of Carrizo Plain. Poppies, gillias, Brodiaea accompany this relative of brassicas. A small rosette of fleshy leaves gives way to an extending inflated hollow spike. Its colored bright yellow/chartreuse and glows from a distance. The MAROON flower not only cluster at the top they symmetrically line the tall stems. All together a glowing sentinel of a plant that is almost never seen for sale. The period of exceptional showiness is brief – 4-6 weeks but it such a bizarre and showy display that we wouldn’t be without it for early/mid spring containers. Might self sow in open disturbed sites. Better to save your own seed. Such a cool west coast native it needs to be appreciated for its unique and luminous beauty. To 30″ tall. Draws native insects including hover flies. Sets seed and dies in early summer completing its life cycle.

My Favorites

Plant type:  |  Sun exposure:
Biome: ,  |  USDA Hardiness zone: Zn8a 15º to 10ºF
Foliage color:  |  Foliage season:

Cerinthe major var. purpurescens

Cerinthe major var. purpurescens

Cool mediterranean annual that we love for its complex combination of bract and flower colors. To 14″ tall the nodding bell shaped flowers are blue with a white ring around the lip. The base of these flowers is yellow. Large bracts protect the flowers and turn from blue green to shades of indigo as they mature. A cool season annual that often self sows. These seedlings cruise through winter without much of a hitch and are up and blooming by mid spring. By the heat of july they quickly die setting profuse seed and disappearing. Light additional water besides rainfall will lengthen the show. Seedlings appear where they are happy- this can even be the cracks in the sidewalk. Seedlings are easy to spot and move or dispatch if unwanted. Nice in spring containers. Plant with early blooming Euphorbias for a real picture of yellow and blue contrast.

My Favorites

Plant type:  |  Sun exposure: ,
Biome: ,  |  USDA Hardiness zone: Zn7b 10º to 5ºF
Foliage color:  |  Foliage season:

Circium occidentale

Circium occidentale

Western Thistle or Ghost Thistle is native to the mountainous regions of southern Oregon into California. Its frequently seen lining road cuts in recently disturbed very well drained soils. To 3′ tall and all white and cobwebby it produces deep magenta flowers on large candelabra type structures. Flowers appear in June and remain until August. Loved by pollinators as well as birds. Leave the structure to over winter and go to seed and you’ll get even more birds. Forms a rosette the first year and blooms the second. No summer water once established. Loves sharp drainage in average to slightly enriched soils. If you have clay amend the soil with pumice or plant on a steep slope. Avoid competition from other plants. Not a weed. Oregon native plant.

My Favorites

Plant type: ,  |  Sun exposure: ,
Biome: , , ,  |  USDA Hardiness zone: Zn5a -15º to -20ºF
Foliage color:  |  Foliage season:

Clarkia amoena 'Dwarf Pink'

Clarkia amoena ‘Dwarf Pink’

Farewell-to-spring is a common wildflower of meadows and glens in Western Oregon. It gets its name because it is often the last wildflower to bloom before the summer drought ends the show. This form differs by its pure pink profuse flowers on a dwarf plant. (The wild form is lavender with a red blotch in the center of each petal.). An amazing display of bloom that appears as if someone dropped a bouquet on the ground. You see no evidence of leaves when its in full fettle. Blooms June to October in a garden setting with regular summer water and rich soil and the gardeners diligence removing spent flowers. Reseeds in open disturbed soil.  to 10″ tall and a little wider forming a dome. Nice cut flower. Fun variation on a native. Very attractive to native pollinators. True hardy annual. Oregon native plant.

My Favorites

Plant type:  |  Sun exposure: ,
Biome: , , , ,  |  USDA Hardiness zone: Zn6a -5º to -10ºF
Foliage color:  |  Foliage season:

Clarkia amoena 'Dwarf White'

Clarkia amoena ‘Dwarf White’

Excellent little selection of our locally native wildflower ‘Farewell to Spring’. To just 10″ tall this plant(s) become a solid dome of white flowers from May-August. Cute little cut flower. Full sun in rich, to average well drained soil with just light competition from other plants. Re-seeds reliably in open disturbed sites. A great native derivative for hell strips and even containers. Regular summer water – or it will shut down go dormant and think its time to set seed and then make its melon. Rough areas, cut flower. Oregon native plant.

My Favorites

Plant type:  |  Sun exposure:
Biome: , , ,  |  USDA Hardiness zone: Zn6b 0º to -5ºF
Foliage color:  |  Foliage season:

Clarkia amoena ssp. lindleyi

Farewell to Spring is so called because it is one of the last conspicuous native wildflowers to bloom before the onset of summer drought. And bloom it does  all the way to late August. Its seen in mass populations waving above the already sear grass on hillsides that dot the valley. Little water is needed but a little supplemental water and removing spent flowers will extend the show.  Otherwise it will die upon setting seed. The 2′ tall stems support multiple luminous pink cup shaped flowers. They appear superficially like a poppy. This is the variety that is locally native in the Portland area. The distinctly lavender pink flowers fade to a lighter interior near the center. But it will also appear with a darker pink/red blotch in the center of each petal on a minority of seedlings.  These assist in guiding pollinators and this plant is a prime source for all native bees and butterflies. Excellent cut flower that lasts for quite a while in a vase. This is the source species of all the fancy cultivars that are raised in the cut flower trade. Reseeds happily in open disturbed sites. Excellent plant for wild areas and is often employed on road cuts and freeway embankments in deliberately sown wild flower mixtures. I’ve noticed that this local subspecies re-sows itself annually where other subspecies and especially the showy florist varieties are shy to do so. If you want a robust, climate adapted wildflower then go with this subspecies. It comes back strong. Probably our showiest and longest blooming native annual.  Reseeds- leave stems to dry and disperse seed and remember to leave open spaces for next years show. Wonderful with yellow Madia elegans for a months long display of brilliant native annuals. A Xera favorite plant. See video below (IMG) taken at the William Finley Wildlife Refuge just south of Corvallis.  Oregon native plant.

My Favorites

Plant type:  |  Sun exposure:
Biome: , , , ,  |  USDA Hardiness zone: Zn6a -5º to -10ºF
Foliage color:  |  Foliage season:

Collinsia grandiflora

Native annuals often get over looked in our gardens. They occupied vast stretches of the Willamette Valley and civilization has caused those displays to suffer. In our gardens they are precious reminders that we should include every category of native plant. Giant Blue Eyed Mary is one of our most delicate looking and stunning in floral detail,  It makes a hazy cloud of beautiful blue and white small snapdragon flowers from late April to Mid June. A true annual that dies once the floral display is done. But leave the skeletons of the plant for several weeks longer to form and shed seeds for next years display. This 20″ tall grassy plant occupies open sunny sites as well as the margins of forests. In our gardens it appreciates open slightly disturbed soil. Seedlings germinate in autumn and over winter as small plants. They will heavily occupy an area about the size of a 9″ pie.  Excellent plant to succeed mid and late spring bulbs. Water lightly after planting and  to establish then none required. Native to the Portland city limits as well. Fantastic displays of this plant can be seen at Camassia in West Linn all through late spring. This is a very reliable re-seeder if you give it some open ground and check for slugs. Seedlings germinate quickly following the first rains and are incredibly cold hardy and drought tolerant. Don’t worry, they are from here, they know what to do. Attracts a wide variety of native pollinators including a wealth of smaller hover flies.  Oregon native plant.

My Favorites

Plant type:  |  Sun exposure: ,
Biome: , , , , ,  |  USDA Hardiness zone: Zn6b 0º to -5ºF
Foliage color:  |  Foliage season:

View all »