Eriogonum umbellatum, courtesy Lockeford Plant Materials Center Photo Gallery
Sunset®: All zones
USDA: 4-10
Sun Exposure: Full sun to part shade
Origin: Western North America
Growth Habits: Evergreen subshrub, low spreading plant, 4 to 18 inches tall (10-45 cm), 3 feet wide (90 cm)
Watering Needs: Low water use, needs good drainage, does not like humid climates
Propagation: Softwood cuttings
The Sulphur-Flower Buckwheat is a variable species. Depending on the seed origin the size as well as the cold resistance vary. 'Polianthum', also called 'Shasta Sulfur' is a relatively large, mounding variety, with abundant bright yellow flowers, hardy to USDA zone 5.
Blooming Habits:
The Sulphur-Flower Buckwheat bears long lasting bright sulfur yellow, to cream-colored, ball-like clusters of flowers fading to orange-yellow, on one foot long stalks, in late spring to summer.
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