|C. caerulea is a drought resistant perennial bearing an abundance of lavender-blue, daisylike flowers on wiry stems during summer. Useful cut flower. Good border plant, especially in mass plantings. Best growth and flower production in full sun. Hardy in zone 3b. This clumping perennial grows to 12 inches hight and 18 inches wide. Keep soil moist until completely established. Drought tolerant when established. Fertilize in spring just before new growth begins. Remove spent flowers to prolong bloom.