Oenothera biennis
This upright forming bienniel is native to Ontario. The evening primrose boasts of lemon yellow flowers that are displayed on long stalks. Hence the name, the evening primrose flowers open at night and close again in the morning. Most pollination is done by nocturnal pollinators such as moths. Is a prolific self-seeding biennial that may need extra control measures to keep in a contained area.
Height : 3-5 feet (90-150 cm)
Evening Primrose
Spread : 2-3 feet (60-90 cm)
Blooming Period : June to September
Light : Full to Partial Sun
Water : Medium
Soil : Sand, loam, clay
Zone : 4-8
Native Ontario Habitat : Fields, prairies, corridors, and ditches
Landscape Uses : Pollinator gardens, meadows and naturalized areas