Scientific: Oenothera speciosa var. berlandieri (formerly O. berlandieri)
Common: Showy evening primrose, Mexican evening primrose, pink ladies
Family: Onagraceae
Origin: Texas into Mexico

Pronounciation: O-en-o-THER-a spee-ci-O-sa

Hardiness zones
Sunset
All zones
USDA All zones

Landscape Use: Dry landscape ground cover for large open, informal spaces, container plant, and floral accent.

Form & Character: Prostrate and vigorously spreading herbaceous perennial, loose and aggressive, informal, festive when in bloom.

Growth Habit: Low, prostrate and spreading aggressively by underground rhizomes and some above-ground stolons. Most active in growth during cooler weather of the year becoming quiescent during summer.

Foliage/Texture: Variable dark green with sometimes red margins of splotches, entire to pinntified; medium fine texture.

Flowers & Fruits: Solitary, axillary pink flowers to 2 inches across with nearly fused petals, fruit inconspicuous.

Seasonal Color: Pink flowers in the spring and fall.

Temperature: Tolerant, though vigor is suppressed by the heat of  a Phoenix summer.

Light: Full sun best, will accept some shade though flowering will be less.

Soil: Tolerant to a range of soil pH. Performs better if soil has a sandy texture.

Watering: Infrequent watering during summer is needed or else this herbaceous plant will go dormant or die back. Drought or cold weather encourages red pigmentation in foliage.

Pruning: Shear or mow to ground during late summer to early fall.

Propagation: Seed, division, root cuttings.

Disease and pests: Foliar bacterial spotting during wet periods or if overhead sprinkler irrigated.

Additional comments: This ground cover is bright and cheery when in bloom, but can become invasive and pesky if allowed to spread without restraint. For best results, plant in a concrete restricted or constrained planter bed area. The cultivar 'Siskiyou Pink' is a profuse pink bloomer in the spring.