Another way to grow coneflower seeds is to let seed heads ripen and dry on plants. In fall, break seed heads apart, sprinkling seeds where you want more coneflowers to grow. Or let coneflowers self-seed on their own. Most coneflowers grown from seed won’t flower until their second growing season.Click to see full answer. Accordingly, do coneflowers spread?Coneflowers grow in clumps, growing outward from the central foliage mound and tap root. Coneflowers spread in clumps up to 2 ft. in diameter. If the clumping plants are not divided, the overcrowded roots do not reach the soil for enough nutrition and the plant declines.Subsequently, question is, do coneflowers come back every year? The truth about newfangled varieties of Echinacea — commonly known as purple coneflower — is often not so pretty, folks. These plants are certainly sold as perennials. That means they’re supposed to be planted in the garden and then come up year after year. But the fact is they don’t. Keeping this in view, does Echinacea reseed itself? All of the species are self-infertile to some degree. Gardeners who want their Echinacea to produce seed should plant at least 2 genetically distinct individuals. If the flower heads are not removed, the wild-types will re-seed in the garden. The plant will release the seeds into the bag when they are ready.Do coneflowers need deadheading?When coneflower blooms start to fade, they can be deadheaded. Deadheading does not change the size of flowers or the length of the blooming season. Although it is not necessary to deadhead coneflowers, it keeps the garden tidy. Leaving a few spent flowers may attract birds, because they like to snack on the seeds.