USDA Zone 4 (-30°F) to USDA Zone 8 (10°F).
10-12" (25-31 cm)
Weekly during dry spells
Prune when dormant
Outstanding color for perennial or rock gardens, in mixed landscape plantings or as a small-scale ground cover. Excellent with sedum ?Autumn Joy' or hardy geraniums. Remove faded flowers to promote foliage growth. Full sun and dry soil conditions produce the deepest blue color.