Seeds of Echinacea purpurea Green Twister. A wonderful drought tolerant 16 – 24″ perennial in this striking lemon green with increasing carmine red center blooms and fuzzy stems and leaves. Grown in gravelly, sandy, and rocky dry limestone prairies, this plant needs very little extra care. A great honeybee food plant. It is hardy to zone 3 and is not frost tender. It is in flower from July to September. Zones 3 to 9.