Roughly 8in taller than 'Coconut Lime', this double white Coneflower also produces more branches. Its large, yellowish green cones cap off the pretty ruffs of milky white petals. 'Milkshake' is delightful as a cut flower, and voted one of the top picks for 2010 in America's Plant Idol. Purple Coneflower is native from Iowa and Ohio south to Louisiana and Georgia, and is a great garden plant everywhere in between. PP 20,594
Echinacea, a North American genus in the Daisy family, has big, bright flowers that appear from late June until frost. Coneflowers thrive in average soils or hot, dry conditions and shrug off cold. Blooms last well, cut or dried, and the seeds in the large cone at the heart of the flower head provide nourishment for birds. Coneflowers are equally at home in formal borders or cottage gardens.