One of the most important genera of indigenous American medicinal plants. Members of this species are very hardy perennials with long bloom periods. Medicinal: Both the roots and aerial parts are used in teas and tinctures. All the echinaceas are used for support and stimulation of the immune system, and as backup treatment for the common cold. Normally grown for 3-4 years for harvest of sizable roots. GERMINATION NOTE: Seeds germinate most readily if stratified first (kept moist and refrigerated, or sown in a cold frame in the winter). See individual species for number of recommended days of stratification. Sow any of the echinaceas outdoors in the fall to allow the oscillating temperatures and natural rain to stimulate germination. Spp. angustifolia: Narrow-leafed Purple Coneflower. Smallest plant of the echinaceas, with narrow leaves and short, pink-purple petals. High level of isbutylamides in this species causes the "tongue tingling" associated with echinaceas. Ht. 8-18". Stratify for min. 21 days. Avg. 7,500 seeds/oz.