How-to Guide
How to Grow Purple Coneflowers
The short answer
Purple coneflower (Echinacea purpurea) grows in USDA zones 3-8 in full sun to part shade — best in full sun — in average, dry-to-medium, well-drained soil. Missouri Botanical Garden rates it low-maintenance and tolerant of drought, heat, humidity, and poor soil, with purplish-pink daisy flowers up to 5 inches across from June to August on plants 2-5 feet tall.
Deadheading spent flowers improves appearance, though plants rebloom without it. Leave at least some seed heads standing if you want the plant to self-seed freely (and feed finches); divide overcrowded clumps about every 4 years.
Site and soil
Give coneflowers full sun for the strongest stems and heaviest bloom; they tolerate part shade. Any average, well-drained soil works — Missouri Botanical Garden notes this eastern and central North American native tolerates drought, heat, humidity, and poor soil once established. Plants reach 2-5 feet tall and 1.5-2 feet wide.
When and how to plant
Set out container plants in spring or early fall so roots establish before temperature extremes, spacing them to allow for a mature spread of about 1.5-2 feet. Coneflower also establishes readily from self-sown seedlings: it freely self-seeds if at least some seed heads are left in place, so you can transplant volunteers in spring or start from seed.
Deadheading and season care
Prompt removal of spent flowers improves the plant's general appearance and keeps borders tidy, but Missouri Botanical Garden notes plants will continue blooming without deadheading. Many gardeners stop deadheading by late summer and leave the cone-shaped seed heads for winter interest and for birds — this is also how the plant self-sows.
✔ Want more plants for free? Leave some seed heads in place in fall; want a tidier planting that stays put? Deadhead consistently so it can't self-seed.
Dividing
Coneflower clumps do not need frequent division — divide overcrowded clumps approximately every 4 years, lifting the clump and splitting it so each piece has roots and growing points, then replanting at the original depth.
Common problems
- Japanese beetles can chew flowers and foliage.
- Leaf spot diseases appear in humid weather.
- Aster yellows is a serious disease of coneflowers; plants with distorted green flowers should be removed.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- Missouri Botanical Garden Plant Finder — Echinacea purpurea — Zones 3-8; full sun to part shade; dry to medium well-drained soil; tolerates drought, heat, humidity, poor soil; June-August bloom; deadheading improves appearance; divide about every 4 years; freely self-seeds; Japanese beetle, leaf spot, aster yellows problems