Ornamental · Asteraceae
Purple Coneflower
Echinacea purpurea
Set in full sun and lean, well-drained soil, purple coneflower carries a border from early summer into fall.
Full sun
Every 7–14 days
USDA 3–8
2–4 ft · 0.6–1.2 m
Overview
Purple coneflower is the kind of sun-loving perennial that gives a border its backbone, a prairie native from the open grasslands and woodland edges of eastern North America. Its sturdy stems lift rosy-purple petals around a raised, bristly cone, a silhouette that reads beautifully in a loose, naturalistic planting and grows fuller each year. Hardy through USDA zones 3 to 8, it holds a garden together through cold winters and hot, dry summers alike.
Few plants set the tone of a summer garden so easily. The flowers carry from early summer well into fall, keeping a bed humming with bees and butterflies through the warm months, and the spent cones left standing draw finches into the winter scene. There is heritage here too, in its long life as the herb echinacea, taken as a supplement for generations.
Its appeal is partly in how little it asks of a busy household. Coneflower wants full sun and soil that drains, then settles into the background of the routine, riding out drought and lean ground that would unsettle a fussier plant. Give it room to breathe in the design and it rewards the space for years.
Care
The short version: give it full sun and lean, well-drained soil, and once it has settled it asks for water only every week or two. It takes clay, sand, and drought in stride, wants little feeding, and returns fuller each year to anchor the border.
Light
Coneflower belongs in full sun, a spot with at least six hours of direct light, where it stands tall and blooms freely to carry a sunny border. It will accept partial shade, though in dimmer corners it stretches, leans, and flowers less, losing the upright poise that makes it such a clean vertical in a planting.
Water
Once it has settled into a bed, coneflower turns drought tolerant and asks for water only every 7 to 14 days, content with dry to medium moisture and an easygoing routine. Water at the base rather than overhead, a small habit that keeps foliage dry and the planting looking healthy.
Soil
It thrives in average, well-drained loam and adapts to clay, sand, and rocky ground, which makes it a forgiving choice for almost any bed. A wide pH of 6.0 to 8.0 suits it, and the one thing to avoid is a low, soggy spot where the soil never drains.
Humidity
Ordinary outdoor air is all it needs, so humidity never enters the planning. What matters in the design is room for air to move, since a crowded, damp corner is where powdery mildew dulls the look of the foliage.
Feeding
Coneflower has low feeding needs and looks its best in lean soil, which keeps the garden routine simple. A light slow-release feed such as 12-6-6 in early spring is all it wants, and heavier feeding only brings floppy stems that break the clean line of the border.
Pruning
Deadhead the spent blooms to keep a planting tidy and stretch the flowering, though it reblooms on its own regardless. Leaving a few seed heads into winter both feeds the birds and lets the planting renew itself, and the standing stems, cut in late fall or left in place, add structure and shelter native bees.
Size & spacing
In bloom the plants reach 2 to 4 feet (60 to 120 cm), a height that sits comfortably in the middle of a border. Allow each one 12 to 24 inches (30 to 60 cm) so the planting breathes, the air moves, and mildew stays out of the picture.
When to plant
Coneflower keeps the unhurried calendar of a northern garden. Sow seed indoors in late winter, move young plants outdoors after the last spring frost, and let the border come alive from early summer into the slow gold of fall.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Sow indoors at 65 to 70°F about 8 to 10 weeks before last frost; germinates in 10 to 20 days.
- Plant: Transplant outdoors after the last spring frost.
- Harvest: Blooms early summer through mid-fall, peaking June through August.
Hardiness
USDA hardiness zones: 3–8
Temperature: down to -40°C
Troubleshooting
Coneflower troubles tend to gather on the flowers or the foliage, and a well-kept, airy planting rarely shows much at all. Reading the early signs below keeps a border looking composed long before a problem moves through it.
Greened petals and leafy sprouts crowding the cone
Blooms that come in green with odd leafy tufts on the cone signal aster yellows, a phytoplasma that leafhoppers move from plant to plant. The trouble runs through the whole plant and never clears, so a coneflower showing greened petals and witches-broom tufts is past saving and will only spoil the look of the bed. Lift it, bag it for the trash rather than the compost, and keep leafhoppers and weedy hosts in check nearby.
Fix:
- Promptly dig up and remove infected plants
- Bag and discard them in the trash, not compost
- Control leafhoppers and weedy hosts nearby
Foliage chewed to lace in midsummer
Foliage chewed to lace in the heart of summer usually means Japanese beetles, which gather on leaves and blooms and strip them to the veins. Pick them off into a pail of soapy water early in the morning while they are still sluggish, and treat lighter outbreaks with insecticidal soap. A little early-summer attention keeps a planting looking its best before the numbers build.
Fix:
- Hand-pick beetles into soapy water in early morning
- Treat with insecticidal soap for light infestations
Warped, rosetted flower heads with a bunched cone
Flower heads that open twisted and rosetted point to eriophyid mites, feeding out of sight inside the developing buds. Too small to see, they leave the warped blooms as the only clue that something is off in the planting. Cut away and dispose of the affected heads in fall to clear the mites before they overwinter.
Fix:
- Cut back and remove affected flower heads in fall
White powdery film coating the leaves
A dusty white-to-gray film on the upper leaves in humid weather is powdery mildew, and it settles in fastest where plants crowd one another in a tight planting. Open up the spacing so air moves freely, and water at the base to keep the foliage dry. It dulls the look for a while but rarely does any lasting harm to the planting.
Fix:
- Improve spacing and air circulation
- Avoid overhead watering
Toxicity
For a household that lives alongside its garden, the verdict is easy: purple coneflower is non-toxic across the board. It stays off the ASPCA toxic plant list, sits safely around cats, dogs, horses, and livestock, and has served people for generations as the herb echinacea. It belongs anywhere life and animals drift through the beds.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A cat grazing a leaf in passing comes to no harm, as the ASPCA does not list purple coneflower among toxic plants.
Dogs None
Let a dog nose or dig through the bed freely, as there is no danger of poisoning.
Horses Safe
Set beside a paddock, a coneflower planting offers horses nothing harmful in leaf or bloom.
Rabbits Safe
The leaves and stems are harmless to rabbits, though they may simply graze the plant down to the ground.
Livestock Safe
Livestock such as goats, sheep, and cattle can share a pasture with coneflower safely, since the plant holds no known toxin.
Birds Safe
Birds are welcome guests here, and finches in particular gather at the dried seed heads through fall and winter.
People Safe
People have long taken echinacea as an herbal supplement, and the plant is regarded as non-toxic.
Varieties
Named coneflowers run from the dependable old purples to bright modern color blends, each setting a slightly different mood in a planting. The few below are the ones a border most often turns to.
Magnus
Magnus brings large flowers on flat, horizontal rosy-purple petals that hold their shape rather than drooping, giving a planting a crisp, dependable face.
White Swan
White Swan trades the usual purple for clean white petals around a warm coppery-orange cone, a cooler note that lightens a border.
Cheyenne Spirit
Cheyenne Spirit is a seed-grown mix that brings red, orange, yellow, purple, and cream into a single planting from one packet.
How to propagate
Coneflower lends itself to a generous garden, easy to spread along a bed by dividing a settled clump or starting fresh from seed and letting it sow itself.
DivisionModerate
Divide clumps in spring or fall, roughly every 3 to 4 years when they become overcrowded. · One growing season to re-establish.
Lift a crowded clump in spring or fall, about every 3 to 4 years, and split it into pieces that each keep roots and shoots to spread along the bed. Replant the divisions right away and they settle back into the planting over a single growing season.
SeedEasy
Sow indoors 8 to 10 weeks before last frost or allow self-seeding in the garden. · Germinates in 10 to 20 days; typically blooms the second year from seed.
Start seed indoors 8 to 10 weeks before the last frost, or simply let the plant drop its own seed into the bed. Sprouts appear in 10 to 20 days, though the young plants usually wait until their second year to flower. Leave the seed heads standing and coneflower quietly fills in the planting on its own.
Myths
Coneflowers will not rebloom unless you deadhead them.
A border keeps flowering on its own, with the plants returning to bloom whether or not the old flowers are snipped. Deadheading is really about keeping a planting tidy, while leaving some seed heads feeds the birds and lets the planting sow itself for the season ahead.
Coneflower poses a poisoning hazard to cats and dogs.
Purple coneflower never appears on the ASPCA toxic plant list and is regarded as non-toxic all around, which makes it an easy choice for a garden shared with animals. It carries a long history as an herbal supplement for people as well.