Stemless Evening Primrose (Oenothera triloba)

Stemless Evening Primrose

Also known as: Stemless Evening-Primrose

Stemless Evening Primrose (Oenothera triloba) is a native perennial wildflower that is commonly considered a weed as it shows up in lawns across North America. In early to late spring, it produces large yellow flowers that open at sunset and close the following day around noon. It thrives in full sun and well-drained soil.

Scientific classification

Species

Stemless Evening Primrose (Oenothera triloba)

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Annual, Biennial, Perennial

Lifespan

Herb

Plant Type

Spring, Summer, Winter

Bloom Time

20 cm

Plant Height

30 cm

Spread

Green, Blue

Leaf Color

2.5 cm to 5 cm

Flower Size

White, Yellow

Flower Color

Images of Stemless Evening Primrose

Distribution of Stemless Evening Primrose

Distribution Map

Stemless Evening Primrose is naturally found in the North American region, specifically originating from the central part of the continent. Over time, its range has expanded through introduction to various other regions, thriving in diverse environments outside its native habitat.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Found in clay or calcerous soils of the Blackland Praire, Rolling Plains, and Edwards plateau

Hemisphere Trend Curve

Northern

Sorthern

Culture

Symbolism

Evening: inconstancy

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Care Guide for Stemless Evening Primrose

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Stemless Evening Primrose, native to North American prairies, thrives in well-drained soils and is drought-tolerant. Weekly watering is essential for its health, but water needs decrease during dormancy in temperate zones, corresponding with seasonal rainfall patterns.

Fertilize: To enhance stemless Evening Primrose's growth and flowering, apply a high-phosphorus fertilizer monthly during active growth, using a teaspoon per plant. Reduce to bi-monthly in cooler months and always water stemless Evening Primrose post-application to avoid root burn and aid nutrient uptake.

Pruning: Stemless Evening Primrose, featuring bright yellow flowers and a rosette of leaves, thrives with early to late spring pruning. Remove dead foliage and spent flowers for renewed growth. Avoid fall pruning to safeguard during winter. Proper care enhances health, airflow, and blooming vigor.

Propagation: Stemless Evening Primrose features vibrant yellow flowers that open in the evening. Propagate by sowing in well-draining soil, maintaining consistent moisture without overwatering. Ensure adequate spacing and sow seeds just below the surface for optimal germination. Thin seedlings for healthier growth and better flowering.

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Images of Stemless Evening Primrose

Distribution of Stemless Evening Primrose

Culture

Care Guide for Stemless Evening Primrose

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