Scientific: Oenothera caespitosa
Common: Tufted evening primrose
Family: Onagraceae
Origin: Western US and northern Mexico, 4,000 to 7,500 feet in elevation.

Pronounciation: O-en-o-THER-a ca-es-pi-TOE-sa

Hardiness zones
Sunset
All zones
USDA All zones

Landscape Use: Small floral accent plant for oasis and xeric landscape border plantings, rock gardens, containers, and hanging baskets.

Form & Character: Evergreen herbaceous perennial, clumping, informal, free.

Growth Habit: Prostrate, rosetting, clumping eventually to 1 foot height with almost a 2 feet spread.

Foliage/Texture: Variable light gray green leaves, sometimes serrate, pubescent, prominent midvein, spatulate, 4 inches long; medium texture.

Flowers & Fruits: Relatively large, solitary, axillary white flowers to 3 inches across with nearly fused petals, slightly tinged with pink, fruit inconspicuous.

Seasonal Color: Tufted evening primrose grows a mass display of white flowers in the spring.

Temperature: Tolerant

Light: Full sun best

Soil: Tolerant of various soil chemistrys including mild alkalinity, but soils must be well-drained.

Watering: Supplemental irrigation during hot weather will maintain healthy appearance.

Pruning: None required (translated....best to leave it alone).

Propagation: Seed, division, root cuttings

Disease and pests: None

Additional comments: Tufted evening primrose is a nice diminutive western native plant for informal landscape borders and flower garden settings.

Oenothera is derived from the greek words oinos (wine) and thera (to imbibe or drink up). Historically, some European plants in this genus were thought to provoke a taste for wine.