
trefle.io · Taken Aug 4, 2022 by Shawna Davis (cc-by-sa)
Polygonaceae
Sulfur-buckwheat
Eriogonum umbellatum
Also known as Sulphur buckwheat, Eriogonum umbellatum subsp. typicum, Umbrella plant, Sulfur flower
Flowering Plants · Native Plants · Native Perennial · Drought Tolerant · Pollinator Plant · Rock Garden · Yellow Flowers · Western Native · Low Growing · Groundcover · Wildflower · Xeriscape
Sulfur-buckwheat is a tough, low-growing western native perennial that produces bright yellow flower clusters attractive to pollinators. Plant it in full sun with excellent drainage — sandy or gravelly soil is ideal — and avoid overwatering or rich, amended soils that can cause root rot. Once established it is highly drought tolerant and requires virtually no maintenance.
Growing conditions
The details behind the basics
- Daily light
- 8 hours
- Watering
- Water lightly; allow soil to dry completely between waterings — this plant thrives in dry, rocky conditions · Every 14-21 days once established
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.5–8
- Temperature
- -25°F to 95°F
- Cycle
- Perennial
Hardiness
USDA 4b-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 4 ft
- Spread
- 3 ft
- Spacing
- 24 in apart
- Growth rate
- Slow
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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