Tennessee coneflower is a federally protected species found nowhere else in nature except on the glades near Nashville, Tennessee, making it one of North America's rarest wildflowers. This striking perennial produces rose-purple petals with slightly upturned tips and distinctive spiny, coppery center disks touched with green, blooming reliably from June through August on rigid stems reaching 18 to 24 inches tall. Hardy in zones 5 to 6, it thrives in full sun to partial shade with moderate water and low maintenance, while remaining drought-tolerant and resistant to deer browsing. Its dramatic daisy-like flowers dry beautifully and work well in fresh arrangements, attracting butterflies and birds throughout the growing season.
18
Partial Sun
Moderate
5-6
24in H x 18in W
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Low
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This is a plant worth growing for its conservation story alone: a U.S. native on the Federal Endangered Species List, rescued from near-total extinction on Tennessee's rocky glades. The flowers themselves are architectural and sculptural, with slightly upturned rose-purple ray flowers surrounding spiny, coppery centers that persist into late summer. Because it has a less vigorous growth habit than other Echinacea species, it requires isolation from related species to maintain its genetic purity if you're saving seed, but this also means it's less aggressive in mixed borders and won't crowd out delicate neighbors.
Tennessee coneflower is grown primarily as an ornamental perennial in native plant gardens and mixed borders, valued for its long bloom period and low-maintenance character. The flowers are excellent for cutting and also dry superbly for dried arrangements and winter interest. Its nectar and pollen make it a magnet for butterflies and other pollinators, so it works beautifully in pollinator gardens and meadow restorations throughout its hardiness range.
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Sow Tennessee coneflower seeds indoors in a seed-starting mix at a germination temperature of 70 to 75 degrees Fahrenheit. Start seeds 6 to 8 weeks before your last spring frost to give seedlings time to establish before transplanting.
Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days. Transplant into the garden after the last frost has passed, spacing plants 12 to 18 inches apart to accommodate their mature width.
Tennessee coneflower can be direct sown into prepared garden beds in spring after the last frost, though indoor sowing provides better control over germination and early growth.
For cut flowers, harvest in the morning once the blooms have fully opened, cutting stems just above a leaf node. For dried flowers, allow blooms to age on the plant until the petals begin to reflex downward and the center cones darken; cut at that point and hang upside down in a cool, dry location. Seed can be harvested once the flower heads have completely dried on the plant; the coppery, spiny centers will feel papery to the touch.
Deadhead spent flowers throughout the growing season to encourage continued blooming and maintain a neat appearance. In late fall or early spring, cut back old stems to ground level to make way for fresh growth. Allow some flower heads to remain on the plant late in the season if you wish to collect seed or provide winter interest and food for birds.
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“Echinacea tennesseensis exists nowhere in the wild except on certain limestone glades near Nashville, Tennessee, where its population had dwindled to the brink of extinction before it was placed on the Federal Endangered Species List. The species was propagated and preserved by botanical institutions and native plant advocates specifically to restore genetic integrity and prevent its disappearance entirely. The Missouri Botanical Garden notes that it must be grown in isolation, several miles from other Echinacea species, if seed is to be harvested and replanted while retaining true genetic identity. This stringent requirement exists because the species is genetically vulnerable and easily hybridizes with other coneflowers, risking the loss of its unique characteristics. Growing Tennessee coneflower in your garden is an act of species conservation and a direct connection to one of America's most precarious native plants.”