Onagraceae
Oenothera elata subsp. hirsutissima
Oenothera elata subsp. hirsutissima
Also known as Oenothera irrigua, Oenothera hirsutissima, Oenothera hookeri var. semiglabra, Onagra ornata
Flowering Plants · Native Plants · Evening Primrose · Yellow Flowers · Night Blooming · Native Perennial · Pollinator Plant · Moths · Prairie Garden · Wildflower · Western Native · Evening Garden
Hairy evening primrose is a tall, striking native perennial that produces large bright yellow flowers opening at dusk, making it a standout in evening gardens. It grows best in full sun to part shade with average, well-drained soil and moderate watering. This vigorous plant is a magnet for night-flying moths and hummingbirds, adding outstanding pollinator value to any garden.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Water moderately, allowing the top inch of soil to dry between waterings · Every 7-10 days
- Maintenance
- Low
- Soil
- sandy loam
- Soil pH
- 5–7
- Temperature
- -25°F to 100°F
- Cycle
- Perennial
Hardiness
USDA 4b-10b
Form & growth
Mature size and habit
- Mature height
- 6 in – 18 in
- Spread
- 18 in
- Spacing
- 24 in apart
- Growth rate
- Fast
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Arizona, California, Colorado, Idaho, Kansas, Mexico Northeast, Mexico Northwest, Nevada, New Mexico, Oklahoma, Oregon, Texas, Utah, Washington
- Attracts
- Bees, Butterflies, Hummingbirds, Moths
Sources: trefle, usda
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