Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00002179
01/01/98
Hardiness Zones: 4 Height: 18 in Spacing: 30 in Type: herbaceous perennial Flowers: Yellow
Comments: Sulphur Flower is native to the Western U.S. It is a low, spreading plant that will form a mat about 3 feet across. The yellow flowers are produced through much of the summer. The plant is quite tolerant of heat and drought but may not grow as well in areas with wet winters and humid summers.
Cultivars:
var. polyanthum 'Shasta Sulfur' - Bright yellow
flowers.
References for Cultivars: Monrovia Nursery Company 1997.