Direct sowing: fall sowing is recommended as this species usually has a fair amount of seed dormancy. Seeds usually need 45-90 days of cold moist chilling (35-40 degrees) before seeds will germinate in spring.
Growing transplants: sow seeds in containers and place outdoors in or in a cold frame in February, seeds should germinate as temperatures rise in late March.
Photo Credit 1: Steele Acres Native Willamette Valley Seed
Photo Credit 2: Nikkie West, Sparrowhawk Native Plants