Thorn Creek Native Seed

The window to plant many of our Palouse native wildflowers is closing!

Plant	Height	Blooms	Light	Planting Date	Purchase
Northern Bedstraw Gallium boreale	1-2'	Early summer			out of stock
Showy milkweed Asclepias speciosa	3 - 5’	Summer		Fall or Spring; no stratification required
Silky Lupine Lupinus sericeus	8-24''	early June to mid-July		Fall preferred; 30-day cool/moist stratification
Western Hawkweed Hieracium scouler var. albertinum	1-2'	Early summer		Fall recommended	out of stock
Western yarrow Achillea millefolium	1-4'	Midsummer		Fall to early Spring
Slender Cinquefoil Potentilla gracilis	2-3'	Late spring to early summer		Fall to Early Spring; 30- to 120-day cool/moist stratification required	out of stock
Oregon checkermallow Sidalcea oregana	2-3'	Mid to late summer		Fall to Early Spring; 30-day cool/moist stratification	out of stock
Sticky Purple Geranium Geranium viscosissimum	1-3'	June through August		Fall to Early Spring; 30-day cool/moist stratification
Elkhorns Clarkia Clarkia pulchella	6-12''	Early to mid summer		Fall to Early Spring; 30-day stratification recommended (but not necessary)
Tall Cinquefoil Potentilla arguta	2-3'	Midsummer		Fall to Early Spring; 30-days stratification
Grand Collomia Collomia grandiflora	12-18''	Midsummer		Fall to Early Spring; 30-days stratification helps.	out of stock
Lewis Flax Linum lewisii	1-2'	Mid to late summer		Fall to Early Spring; short startification however best results with fall /winter seeding
Missouri goldenrod Solidago missouriensis	2-3'	Late summer to fall		Fall to Spring; no stratification required	out of stock
Blanketflower Gaillardia aristata	2'	Mid to late summer		Fall to Spring; no stratification required
Prairie Smoke Geum triflorum	6-18''	Spring to early summer		Fall to Spring; no stratification required
Western Aster Symphyotrichum spathulatum	1-2'	Midsummer to frost		Fall to Spring; no stratification required	out of stock
Oregon sunshine Eriophyllum lanatum	4-24''	Late summer to fall		Fall/Winter; 90-day cold/moist stratification
Wyeth Buckwheat Eriogonum heracleoides	12-18	Midsummer		Fall/Winter; 90-day stratification required
Taper-leaf Penstemon Penstemon attenuatus	1-2'	Early to midsummer		Fall/Winter; 90-day stratification required	out of stock
Arrowleaf Balsamroot Balsamorhiza sagittata	24	Early Spring		Fall/Winter; 90-days stratification required
Fernleaf Lomatum Lomatium dissectum	2-4'	Spring		Fall/Winter; up to 330-day stratification!
Little Sunflower Helianthella uniflora	2-4'	Fall to Very early Spring		Fall; 30+ day cold/moist stratification.
Yellowish Penstemon Penstemon confertus	1-2'	Mid summer		Fall; 60-day cool/moist stratification	out of stock
Idaho Fescue Festuca idahoensis	1-2'	Summer		late Fall preferable, early Spring if necessary	out of stock
Nine-leaf Lomatum Lomatium triternatum	28''	Early spring		late Fall to early Winter to allow for natural cool/moist stratification
Bluebunch Wheatgrass Pseudoroegneria spicata	1-3'	Midsummer		Seed in very early spring on heavy to medium textured soils and in late fall on medium to light textured soils.	out of stock
Blue Wildrye Elymus glaucus	3-4'	Midsummer		Spring	out of stock
Prairie Junegrass Koeleria macrantha	6-24''	Early summer		Spring recommended	out of stock