Oenothera biennis
Common Evening Primrose
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Common Evening Primrose (Oenothera biennis) - Description
Oenothera biennis (Common evening primrose, Evening star, or Sun drop) is a species of Oenothera native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. Evening primrose oil is produced from the plant.
Common Evening Primrose (Oenothera biennis) - Blooming
Blooms during the summer with large cup-shaped flowers that are usually white, yellow, or pink. The flowers open at dawn or dusk.
Common Evening Primrose (Oenothera biennis) - Growth
Evening Primroses do well in full sun. Plant height varies depending on variety. One species can grow to approx. 6 ft. tall. Works great in a rock garden.
Common Evening Primrose (Oenothera biennis) - Planting
Propagate from the seed. Annuals and perennials should be planted in spring, biennials in summer (if planting in containers in a cold frame). Can also plant annuals and biennials "in situ" in fall. Propagate from softwood cuttings of perennials in spring before flowering occurs. Plant cuttings at a distance from seeded plants to avoid interference between taproot species. Can achieve this by first planting in containers.
Common Evening Primrose (Oenothera biennis) - Pest
Under wet conditions, Oenothera is susceptible to root rot. Other issues include downy mildew, powdery mildew, rust, leaf gall, and leaf spot, all of which are quite common.
Common Evening Primrose (Oenothera biennis) - Interesting facts
Oenothera is mostly native to North America, although some species are found in South America.
Common Evening Primrose (Oenothera biennis) - Soil and irrigation
Plant requires little irrigation. Does best in poor-moderately fertile, gritty soil. Soil must be well-draining.
