Gardening
in Tucson, Phoenix,
and Southern California

Gardening in Tucson, Phoenix, and Southern California

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Oenothera speciosa: Pinkladies / Mexican Evening Primrose

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Description
Form: A colony-forming herb.
Lifespan: Perennial.
Leaf retention: Evergreen but cold deciduous.
Growth rate: Rapid.
Mature Size: 1-2' high.
Flowers: White to pink, 2" wide, fragrant.
Bloom: Spring into fall, depending on rainfall. Open during the day.
Fruit: Seed capsule, tapered cylinder, about 1/2" long.
Leaves: Green, variable, lance-shaped to elliptical, edges can be wavy-edged, partly toothed, or smooth.
Stems: No thorns. Erect or reclining.
Roots: Spreads by rhizomes. Invasive - grow in confined space.
Wildlife: Flowers attract bees, seeds attract birds.
Toxic / Danger: No.
Origin: United States and Mexico.

Cultivation and Uses
USDA hardiness zones: 5-9.
Heat tolerant: Goes dormant in hottest parts of summer, revives with summer rains.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water once established: Monthly in part shade.
Soil: Well drained, pH 5.6-8.5 (acidic to alkaline).
Prune: In winter, prune dead flower spikes to base.
Litter: Low.
Propagation: Seed. Freely reseeds on its own.
Uses: Ornamental, ground cover.

Comments
A member of the Evening Primrose / Suncups / Sundrops family, but not the true Primrose family.



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