Spreads fast — no pruning! Rock gardens, borders, bare spots under shade trees and steep banks will come alive with carefree color. Fill troublesome areas with star-like flowers that bloom June through September. Semi-green foliage, even in sub-zero weather. Two sizes available. Hardy, Northern-grown clumps are dug from the fields and contain a large root system ready to come alive into a block of color. Or choose nursery separated divisions that have been properly divided so the plants are ready for spacing to cover a large area economically. Divisions should be planted about 1′ apart. Zones 3-9.