Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 366. Courtesy of Kentucky Native Plant Society.
Sunset®: 2,3,10,28-45
USDA: 4-9
Sun Exposure: Full sun, intolerant of shade
Origin: North America, from Canada to Texas
Growth Habits: Deciduous subshrub to shrub, 3 feet tall and wide (90 cm); leaves with silvery pubescence
Flowers: Purple or blue flowers
Watering Needs: Low to moderate water use, needs good drainage, tolerates salinity
Propagation: Seeds
Blooming Habits:
Purple flowers with yellow stamens, in 4 to 6 inches long (10-15 cm), dense, spike-like clusters, in summer.
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