Evening Primrose, King’s Cure-All Flowers

The night-flowering Evening Primrose (Oenothera biennis) has delicate four-petal lemon-scented lemon-yellow 2" blossoms that close every day by noon, opening again in the late afternoon and evening. Plants grow 2'-6' tall on hairy stems tinged with purple. Also called King’s Cure-All for its herbal and medicinal properties. Life cycle: Biennial Bloom season: Spring, summer, fall Attracts: Birds, bees, butterflies, moths, and other pollinators Flower meaning: Bashfulness, inconstancy, longevity, youth SEED PLANTING TIPS Botanical name: Oenothera biennis Hardiness zones: 4-9 Planting season: Spring, summer Days to maturity: 2nd year Cold stratify: Yes Depth to plant seeds: Lightly cover - seeds need light to germinate Spacing between plants: 12"-18" apart Days to germinate (sprout): 15-30 days Germination soil temps: 65F-70F Soil types: Sandy, loamy, rich, well-drained Soil pH: 5.5-7.5 Water needs: Average Sun needs: Full sun, part shade Frost tolerant: No Drought tolerant: Yes Dee