A Very beautiful purple wildflower that grows to about 3 feet tall with very large purple daisy like flowers with drooping petals. With 3 foot blooms these flowers. Make a great background border. This North American native wildflower is an excellent addition to any garden. Plants are long-lived, and will grow well in a variety of conditions. The 3" to 4" flowers have beautiful lavender petals with a large cone-like, deep purple brown center. Makes a beautiful cut flower. Sow your seeds about â…› inch deep. Plant when soil is nice and warm, about 70 degrees or so. Hardy in USDA zones 2a-10a. Most of the plant has some medicinal value, but it is the fresh root that is most effective for use as medicine. Echinacea root is an immune-stimulant. It can be used in treating the early phases of bacterial or viral infection. Echinacea speeds resolution of colds, flu and all kinds of upper respiratory infection. The herb can also be used as an anti-inflammatory.