'Knock 'em Red' has 4" wide flowers open a deep crimson color before turning fluorescent red. Praised for their cheerful brightly colored flowers, coneflowers are a mainstay in today's garden. Be sure to leave some spent blooms on the plants in the fall because their seeds provide winter food for finches and other birds. The dried seed heads also provide architectural interest in the winter.

(Photo courtesy of Walters Gardens, Inc.)