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Details
It can reach heights of 6' in the right conditions but is often shorter. It is one of the last natives blooming late into fall. As a biennial, it grows vegetatively during the first year and completes its life cycle during the second, but will re-seed. it is a very important native plant with a long bloom time benefiting nectarine moths, butterflies, caterpillars, and many kinds of bees. Much of the life cycle of the stunning Primrose Moth can be in the Common Evening Primrose plant.
Michigan Seeds and Plants grown on our farm, Renegade Acres, in Howell, MI!
Certified Organic by Oregon Tilth.
Additional Info
| Botanical Name | Oenothera biennis |
|---|---|
| Life Cycle | Biennial |
| Min. Time to Germinate | 15 Days |
| Max. Time to Germinate | 30 Days |
| Depth to Sow Seeds | Surface Sow; press seeds gently into the soil to make good contact, but do not cover with any additional soil; these seeds require light to germinate |
| When to Sow | Indoors 8-10 weeks before last spring frost, Outdoors after all danger of spring frost is past |
| Growing Height | 4-6 ft. (1.2-1.8 m) |
| Plant Spacing | 9-12 in. (22-30 cm) |
| Hardiness | USDA Zone 5a: to -15F, USDA Zone 5b: to -10F, USDA Zone 6a: to -5F, USDA Zone 6b: to 0F, USDA Zone 7a: to 5F, USDA Zone 7b: to 10F, USDA Zone 8a: to 15F, USDA Zone 8b: to 20F |
| Sun Exposure | Full Sun |
| Danger | N/A |
| Bloom Color | Bright Yellow |
| Bloom Time | Late Summer/Early Fall, Mid-Summer |
| Foliage | Herbaceous |
| Other Details | Average Water Needs; Water regularly; do not overwater, Drought-tolerant; suitable for xeriscaping, Flowers are fragrant |
| Soil pH Requirements | 6.1 to 6.5 (mildly acidic), 6.6 to 7.5 (neutral), 7.6 to 7.8 (mildly alkaline) |
| Propagation Methods | From seed; direct sow after last frost, From seed; sow indoors before last frost |
| Seed Collecting | Collect seedhead/pod when flowers fade; allow to dry, Properly cleaned, seed can be successfully stored |
| Seeds Per Pack | 100 |
