Edmonton Native Plant Society
native plant stewards
Native Plants - O
Oenothera biennis
Yellow Evening Primrose (Common Evening Primrose)
Evening Primrose family - Onagraceae

Biennial; forms leafy rosette 1st year; flower stalks appearing 2nd year. Flowers open in evening. Fairly prolific self-seeder; can be a nuisance. Allow only a few seed pods to ripen for replacement plants; cut off the rest.

Bloom time: June - August
Height: 50 - 150cm (18-70”)
Growing conditions: Sun; average soil.

Easy germinator. Direct seed in spring or late fall.