The easiest echinacea to grow — germinates without stratification. Vigorous plants with large, purple-petaled flowers. Fibrous roots are easy to harvest (other species have taproots). Attracts and is a food source for bees. Also known as purple coneflower and eastern purple coneflower. Normally grown for 3–4 years for harvest of sizeable roots. Perennial in Zones 3–10. Ht. 24–36". Avg. 7,700 seeds/oz. Packet: 200 seeds.