The shy yellow blooms of Oenothera biennis tend to open at dusk and close in the heat of the day, earning it the name “Evening Primrose”. The foliage is is short the first year, and then tall flower stems emerge to bloom from June to September the second year.

Oenothera biennis Evening Primrose is a short-lived perennial (or biennial) that self-sows freely, making it great for naturalizing in the landscape. Its seeds are highly attractive to birds.

Oenothera biennis Evening Primrose is native to Eastern and Central US. It thrives in full sun to part shade and moist, well-draining soil, although it is very tolerate of drought and dry, hot soil.