Evening Primrose Seeds - Flower Plant

Evening primrose seeds produce warm-season biennial to short-lived perennial plants with an upright, branching growth habit and lance-shaped foliage. These plants develop delicate, cup-shaped blooms that open during the evening under suitable conditions. Evening primrose thrives in warm climates and performs best in full sunlight with well-drained soil. It is adaptable to a range of soil types, including sandy and moderately poor soils, and requires moderate watering during establishment. Suitable for garden beds, wildflower plantings, and naturalized areas, the plants establish steadily and provide seasonal floral display.

Features

• Biennial to short-lived perennial flowering plant
• Produces evening-opening, cup-shaped blooms
• Suitable for garden beds, wildflower gardens, and naturalized areas
• Adaptable to a range of well-drained soil conditions
• Performs best in full sun

Specifications

• Scientific Name: Oenothera biennis (common species)
• Common Name (US): Evening Primrose
• Seed Type / Variety: Flowering biennial/perennial variety
• Growth Habit: Upright, branching biennial or short-lived perennial
• USDA Zones: 4–9
• Planting Season: Spring or fall
• Growing Season: Spring to summer (flowering typically in second year)
• Sowing Season: February to April; September to October (mild climates)
• Germination Time and Conditions: 10–20 days at 18–22°C with light soil coverage
• Sunlight Requirements: Full sun
• Soil Requirements: Well-drained sandy or loamy soil
• Watering Needs: Low to moderate; drought-tolerant once established
• Mature Plant Size: 60–150 cm height; 30–60 cm spread
• Plant Spacing: 30–45 cm between plants