Evening Primrose
Oenothera biennis
outdoorEvening primrose is a biennial wildflower producing tall spikes of fragrant, bright yellow flowers that open in the evening. It is a prolific self-seeder and can naturalize easily in gardens, meadows, and disturbed areas. The plant is valued for its nutritional seeds and medicinal properties, as well as its ornamental appeal.
Common Problems
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Care Guide
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Light
Full sun is essential for vigorous growth and abundant flowering; requires at least 6 hours of direct sunlight.
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Water
Moderate water during establishment; once mature, drought-tolerant. Water during prolonged dry spells but avoid waterlogging.
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Soil
Tolerates poor, sandy, gravelly, or well-draining soils. Not fussy about fertility; avoids heavy clay and wet conditions.
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Fertiliser
Generally requires no supplemental fertilizer in average garden soil. Excess fertility may promote leaf growth over flowers.
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Temperature
Hardy biennial; tolerates frost and cold winters. Thrives in temperate climates.
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Humidity
Low to moderate humidity; prefers drier conditions and may struggle in humid climates.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to cats, dogs, and children; seeds are edible and traditionally used in herbal remedies.
Common Diseases
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.