Polygonaceae
Smooth Sulphur Flower
Eriogonum umbellatum var. glaberrimum var. glaberrimum
Also known as Eriogonum umbellatum var. subaridum, Eriogonum glaberrimum, Glabrous Sulphur Flower, Smooth Wild Buckwheat
Flowering Plants · Native Plants · Buckwheat · California-Native · Oregon-Native · Smooth-Leaf · Wildflower · Pollinator · Rocky-Soil · Drought-Adapted · Perennial
Distinguished by its notably smooth, glabrous foliage, this California and Oregon native buckwheat is a hardy, slow-growing perennial suited to partially shaded rocky or gravelly sites. Plant in well-draining soil and water sparingly once roots are established to mimic its natural habitat conditions. It is a rewarding choice for native plant enthusiasts seeking low-maintenance pollinator plants.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water deeply but infrequently; allow soil to dry between waterings · Every 10-14 days
- Maintenance
- Low
- Soil
- rocky
- Soil pH
- 6.5–8
- Temperature
- -25°F to 100°F
- Cycle
- Perennial
Hardiness
USDA 4b-10b
Form & growth
Mature size and habit
- Mature height
- 12 in – 3 ft
- Spread
- 2 ft
- Spacing
- 18 in apart
- Growth rate
- Slow
- Root depth
- Deep
- Flowers
- Yellow
- Foliage
- Green · Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- California, Oregon
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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