Oenothera elata ssp. hookeri
This is one of the largest and showiest of the evening-primroses. The biennial spends its first year as a low rosette of leaves. The second year, clusters of bright yellow, 3 in., flowers are borne atop the leafy 3-6 ft. stems. These flowers unfurl in late afternoon or at dusk, are quite fragrant, and have four heart-shaped petals.
Lady Bird Johnson Wildflower Center

Flowers: J F M A M J J A S O N D
Status: Native
Origin: West KS to CA and south to Mexico
Family: Onagraceae (Evening Primrose)
Size: 3-6′
Sun: Full
Watering: Moderate
Growth Rate:
Soil: Tolerates most soils
Temperature:
Pruning:
Disease and Pests:
Uses: Special value to native bees. Host for the White Lined Sphinx Moth and Flower Moth
Notes: Also called the Giant Evening Primrose. Can become weedy.
Photo by iranah
Resources
PW Interpretive Trails Project – Join Us!
Imagine a world where every garden, school yard, and public space becomes an immersive and educational experience.
A place where nature and knowledge intertwine to create stunning interpretive trails.
With a simple scan using your smartphone, you’ll unlock a whole new level of information and convenience.
No more searching through countless books or websites to find details about your plants.
