Purity boasts more than 25 blooms on a year-old established plant. Strong and well branched, this coneflower prefers full sun. Use a coarse and slightly mineral soil with a pH of 5.8-7.3. Hardy to Zones 4 to 9, Purity finishes in six to eight weeks. Flowers should be deadheaded to prolong bloom.from Terra Nova Nurseries, Inc.