Rudbeckia purpurea, Purple Coneflower. Perennial plant with large, fragrant pink flower blooms at the beginning of April and May. The 3 to 5 ft flower stalks make them an excellent background planting for your landscape, or in a butterfly garden. They are excellent for cut flowers, lasting a week or longer after being cut. Cutting the flowers will promote an extended blooming season. This plant is used for deriving active ingredient for plant hormone Cirkon Cover seeds with 1/4" soil. Moisten the soil when it is nearly dry. Provide bright light and warmth. 20 days to germinate. Cold hardy. Ordering seeds info