Evening Primrose Flower Seeds (Organic)

Evening primrose seeds introduce a resilient, pollinator-attracting herb into your organic garden, suited to sunny borders, dry meadows, or wildflower plantings. Oenothera biennis is a self-seeding biennial or overwintering annual native to Europe and North America, prized for its tall stature, soft yellow blossoms, and herbal uses. Plants grow 3 to 4 feet tall and produce blooms that open in the evening and close by morning—making them a key food source for bees and night-pollinating insects. Evening primrose thrives in full sun to partial shade and well-drained soil.

Variety Details

• Botanical name: Oenothera biennis
• Plant type: Biennial
• Growth habit: Upright
• Crop category: Flower seed
• Recorded feature: Open-Pollinated
• Product format: Seed packet

Sowing & Growing

• Soil Temperature: Cool to moderate
• Planting Depth: Surface sow
• Germination: Light-dependent
• Height At Maturity: 36"–48"
• Sun/Shade: Full Sun to Part Shade
• Spacing After Thinning: 12"

Prepare a weed-reduced seedbed for Evening Primrose Flower and use the recorded planting season, depth, and light requirements. Press shallow-sown seed into good soil contact and keep the seed zone from drying during establishment. Thin or transplant only when the growth habit and spacing call for it. Leave enough room for mature width and air movement. Bloom timing and final height can shift with sowing date, climate, soil, moisture, and competition, so use listed figures as planning ranges.

Direct sow in fall or early spring by pressing seeds into the soil surface—do not cover, as light is required for germination.

Place Evening Primrose Flower where its recorded height and growth habit fit the surrounding planting. Shorter companions can be positioned toward bed edges, while taller stems need room where they will not shade small seedlings too early. If cutting flowers, harvest with clean tools at the stage appropriate to the bloom form. If leaving flowers in place, observe how bloom sequence changes through the season and record which sowing date performed best at the site.

Explore related options in our Seed Packs and Bulk Seeds Collection.