Asteraceae
Crepis occidentalis subsp. costata
Crepis occidentalis subsp. costata
Also known as Psilochenia occidentalis subsp. costata, Crepis occidentalis var. costata
Flowering Plants · Native Plants · Ribbed Hawksbeard · Crepis · Native · Xeriscape · Dry Slope · Western · Wildflower · Yellow Flowers · Habitat Restoration · Low Maintenance
Ribbed western hawksbeard is a native perennial found on dry, open slopes and ridges from California to Montana, distinguished by its prominently ribbed achenes. It thrives in well-drained, rocky or gravelly soils with minimal supplemental water once established. Best used in native plant gardens, xeriscape designs, or habitat restoration projects where it naturalizes readily.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Water moderately; allow the top 1-2 inches of soil to dry between waterings · Every 10-14 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 5.7–7.5
- Temperature
- -10°F to 85°F
- Cycle
- Perennial
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 18 in – 3 ft
- Spread
- 2 ft
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- British Columbia, California, Colorado, Idaho, Montana, Nevada, Oregon, Saskatchewan, Utah, Washington, Wyoming
- Attracts
- Bees, Butterflies
Sources: trefle, usda
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