Growth rate: Rapid.
Mature Size: 12-18" high and 24" wide.
Flowers: Bright yellow, four wrinkled petals, with a 24 hour lifespan. Each flower
opens in the evening, then closes the next afternoon just before the next set of flowers open
up, and dries to a pinkish, crumpled wad.
Bloom: Spring and summer.
Fruit: A cylindrical seed capsule located behind the sepals in what looks like the
enlarged top portion of the flower stalk.
Leaves: Green, linear to thinly lance-shaped.
Stems: Drooping to erect, becoming woody with age, no thorns.
Wildlife: Attracts butterflies, sphinx moths, bees, and birds. This plant is pollinated
by sphinx moths.
Toxic / Danger: No.
Origin: Texas, New Mexico, Arizona and Mexico.
Cultivation and Uses
USDA hardiness zones: 5-9.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun, even with reflected heat, to part afternoon shade. The flowers open
earlier in the evening with part afternoon shade.
Water once established: Once or twice a month. This plant tolerates weekly water
only in very well drained soil. It does not like high humidity.
Soil: Well drained, dry, pH 6.6-8.5 (neutral to alkaline), saline tolerant.
Mulch: Gravel or bare soil. Avoid organic mulch which keeps the soil too wet.
Prune: In late winter after the last freeze, prune to 1-2" tall and remove dead
growth. Hard pruning triggers new growth and blooms.
Propagation: Seed sown in the fall.
Uses: Ornamental, ground cover.
This plant is a member of the Evening Primrose family (Onagraceae).
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Latest update: February, 2019.