Coneflower planting zones

Which coneflower for your zone

Clemson’s Home & Garden Information Center says coneflowers are hardy in zones 3 to 9, depending on the species, and gives each species its own range: narrow-leaf purple coneflower zones 2 to 8, pale purple coneflower 4 to 8, yellow coneflower 4 to 7. For purple coneflower, Penn State Extension says zones 3 to 9, University of Illinois Extension 3 to 8, NC State Extension’s plant toolbox 3a to 8b, and the UF/IFAS fact sheet zones 4 through 10.

Purple coneflower (Echinacea purpurea) is the one most readily available, Clemson says. It grows well throughout South Carolina except on the coast, because of its poor salt tolerance; NC State, writing for North Carolina, calls it salt resistant. The page prints both. Clemson says narrow-leaf and yellow coneflowers will not tolerate wet soil and may not overwinter reliably in South Carolina, and that pale purple coneflower is short-lived, lasting only 2 to 3 years.

Illinois Extension’s Ryan Pankau says purple coneflower prefers moister conditions and tolerates more clay, while pale purple coneflower is adapted to drier sites and poorer soils and grows a deep taproot that makes it more sensitive to transplanting. Mississippi State University Extension says the nine North American species range from the Gulf of Mexico to beyond the Canadian border.

Hybrids and why they fade

Pankau says many gardeners report that newer Echinacea hybrids fade away after a season or two, and that individual purple coneflower plants typically last only 2 to 3 years in the garden, with their seedlings keeping a patch going. He adds that double-flowered types have more petal-like ray flowers at the expense of the disc flowers that hold pollen and nectar, which makes them less valuable to pollinators and gives birds fewer seeds.

Clemson says the ‘Big Sky’ series, hybrids of purple and yellow coneflower, may not be reliably hardy in poorly drained soils. Penn State names ‘Powwow Wildberry’, and Clemson lists cultivars of purple coneflower such as ‘Magnus’, ‘White Swan’ and ‘Kim’s Knee High’; Pankau points gardeners to the trial reports from the Mt. Cuba Center and the Chicago Botanic Garden for how individual cultivars have held up.

Planting and care

Clemson calls fall the best time to plant coneflowers. They do best in full sun to part shade in evenly moist, well-drained soil and are drought- and heat-tolerant once established (Clemson, Penn State). Mississippi State says to plant in berms or raised beds so water drains away from the crowns, and not to bury the crown below the surrounding soil, which can lead to crown rot.

Coneflowers are not heavy feeders, Clemson says. Illinois warns that heavy fertilizing leads to tall, leggy plants that fall over. Mississippi State feeds each spring with a light sprinkling of balanced controlled-release fertilizer or compost, and warns that excess mulch holds moisture against the crown, so pull mulch away from it. Clemson and Penn State both say proper spacing improves air circulation and helps prevent disease.

Starting coneflowers from seed

Clemson says purple coneflower is commonly started by seed and will usually self-sow in the garden, and that plants from seed can take 2 or more years to reach a sizable plant. Mississippi State says a short period of cool, moist stratification helps even germination, and that sowing seed in small pots in the fall and leaving the pots outside is an easy way to give it; transplant the seedlings the next spring when they have two or three sets of leaves. Penn State says the seeds need cold stratification to germinate.

Dividing coneflowers

Clemson divides coneflowers every 3 to 4 years to prevent overcrowding, in spring or fall. Mississippi State also says every three to four years, in spring as new growth emerges, with each crown division carrying a shoot and roots. The UF/IFAS fact sheet says to divide clumps every few years to keep them blooming.

Pankau says purple coneflower’s shallow, fibrous roots make it easy to dig and move, while pale purple coneflower’s taproot makes it more sensitive to transplanting.

Fall: deadhead or leave the seed heads

Every source here leans toward leaving them. Clemson says deadheading should be delayed because the seed heads are very attractive to goldfinches in winter, and NC State to leave some flower heads on to produce seeds for the birds. Penn State calls coneflower an important source of seeds for songbirds, particularly the American goldfinch. Pankau leaves all the seed heads on his own plants, while noting that deadheading or removing seed heads cuts down on unwanted seedlings.

NC State adds that native bees nest in the dead, hollow stems, and encourages gardeners to cut dead stems back to 12 to 24 inches and leave them standing. Clemson says dead foliage and stems can be removed each year in the fall, winter or early spring. The exception is disease: Penn State and Clemson both say plants with mites or disease should be cut back to the ground in the fall and the debris removed and destroyed.

Common problems

Clemson and Penn State list stem rots, powdery mildew and anthracnose, plus aphids, Japanese beetles and eriophyid mites, and say the symptoms are usually mild. The serious one is aster yellows. Clemson says it is spread by leafhoppers and causes a witches’ broom in the flower head, greening of the petals, stunting and possibly death, and that infected plants should be removed and destroyed. Mississippi State also removes and destroys infected plants and says never to put them in the compost pile; Pankau calls aster yellows a pathogen of increasing concern.

Clemson says eriophyid mites live inside the flower buds and cause tufts of stunted, distorted flower parts. Mississippi State says spittlebugs can be a problem in spring and summer as the buds form, and UF/IFAS that sweet potato whitefly can infest the plants. Clemson says rabbits can eat the foliage to the ground.

On deer the sources disagree. Clemson says coneflowers are deer resistant and Illinois that they are reportedly deer resistant; Penn State says coneflower is not deer-resistant.

Common mistakes

• Burying the crown or heaping mulch on it. Mississippi State says both hold water against the crown and can lead to crown rot.
• Feeding heavily. Illinois says it gives tall, leggy plants that fall over.
• Cutting off every seed head in fall. Clemson and Penn State say the seed heads feed goldfinches through winter.
• Composting a plant with aster yellows. Mississippi State and Clemson both remove and destroy it.
• Expecting a single coneflower to live for decades. Illinois says individual plants typically last 2 to 3 years, with seedlings carrying the patch.

We found no Texas, Louisiana or Alabama source for coneflowers that we could read; Texas A&M AgriLife, LSU AgCenter and Alabama Extension did not load from here. Southern advice on this page comes from South Carolina, Mississippi, North Carolina and Florida.

Questions

Should you deadhead coneflowers in the fall?

Clemson says to delay deadheading because the seed heads are very attractive to goldfinches in winter, and NC State to leave some flower heads on for the birds. Illinois’s Ryan Pankau notes that removing seed heads does cut down on seedlings.

When should you divide coneflowers?

Clemson divides every 3 to 4 years in spring or fall; Mississippi State every three to four years in spring as new growth emerges, with each division carrying a shoot and roots.

Why did my coneflower disappear after a year or two?

Illinois says individual purple coneflower plants typically last only 2 to 3 years and many newer hybrids fade after a season or two. Clemson says the ‘Big Sky’ hybrids may not be reliably hardy in poorly drained soils, and Mississippi State that a buried crown can rot.

What is aster yellows on coneflowers?

Clemson says it is spread by leafhoppers and causes a witches’ broom in the flower head, green petals, stunting and possibly death. Clemson and Mississippi State both say to remove and destroy infected plants, never composting them.

Are coneflowers deer resistant?

The sources disagree. Clemson says they are deer resistant and Illinois that they reportedly are; Penn State says coneflower is not deer-resistant.

Sources

Freeze dates on this page are NOAA 1991–2020 Climate Normals, for every station the ZIP codes in each zone cite. Zones are the USDA Plant Hardiness Zone Map, 2023. The type table is a judgement, as labelled above. Growing advice is quoted from the extension publications below, each written for its own area.

• Clemson Cooperative Extension, Home & Garden Information Center, How to Grow Echinacea (Coneflower) (HGIC 1182) , by Millie Davenport (Updated April 9, 2025). Written for: South Carolina (USDA zones 8a–9b).
• Penn State Extension, Purple Coneflower , by Constance Schmotzer (Updated August 7, 2025). Written for: Pennsylvania (USDA zones 5b–8a).
• University of Illinois Extension, Purple Coneflower . Written for: Illinois (USDA zones 5a–7a).
• University of Illinois Extension, Coneflowers in the garden , by Ryan Pankau (July 4, 2026). Written for: Illinois (USDA zones 5a–7a).
• NC State Extension Gardener Plant Toolbox, Echinacea purpurea (purple coneflower) . Written for: North Carolina (USDA zones 6b–9a).
• Mississippi State University Extension, Purple Coneflowers for the Mississippi Gardener (P2690) . Written for: Mississippi (USDA zones 7b–9a).
• UF/IFAS EDIS, Echinacea purpurea: Purple Coneflower (FPS192) , by Edward F. Gilman, Ryan W. Klein and Gail Hansen . Written for: Florida (USDA zones 8b–11b).

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Published October 26, 2026