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Echinacea purpurea 'White Swan' (White Swan Coneflower)
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Dcoetzee, no rights reserved (CC0) · Wikimedia Commons

Echinacea purpurea 'White Swan'

White Swan Coneflower

Eastern and central North America (prairies, open woodlands, meadows)

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At a Glance

HabitUpright
FoliageDeciduous
Height24-36 inches (60-90 cm)
Width18-24 inches (45-60 cm)
Maturity2 years

Growing Zones

USDA Hardiness Zones

3 - 9
These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →
Frost Tolerancehardy

Overview

Echinacea purpurea 'White Swan' is an upright, clumping, herbaceous perennial reaching 24–36 inches (60–90 cm) tall with a spread of 18–24 inches (45–60 cm). This is the standard white-flowered selection of E. purpurea, producing single, daisy-like flower heads 3–4 inches (8–10 cm) across with white ray florets that droop slightly from a prominent, dark copper-orange to bronze central cone. The white rays may develop a slight greenish or pinkish tint as they age. Flowers are borne on sturdy, branching stems from July through September. The basal foliage is dark green, coarsely textured, with the characteristic rough, sandpapery surface. Growth rate is moderate. Seed-grown, so some variation in flower color purity and ray angle occurs—occasional plants may show pale pink rather than pure white. Hardy to zone 3.

Native Range

Echinacea purpurea is native to eastern and central North America, in prairies, open woodlands, thickets, and meadows. White-flowered forms occur naturally in wild populations.

Suggested Uses

Planted in borders, moon gardens, cottage gardens, and meadow plantings at 18–24 inch (45–60 cm) spacing. The white flowers brighten shaded edges and evening gardens. Combines with pink echinaceas, grasses, and blue-flowered perennials. Functions in native plant gardens and pollinator plantings. The dark cones attract goldfinches in winter. Not suitable for full shade or waterlogged soils. Seed-grown variation may produce occasional off-white or pale pink individuals.

How to Identify

Distinguished from pink-flowered E. purpurea cultivars ('Magnus,' 'Bravado,' 'Leuchtstern') by the white (versus rosy-pink to magenta) ray florets. Distinguished from Leucanthemum (Shasta daisy) by the prominent, raised, spiny, dark cone (versus flat yellow disc) and the drooping (versus horizontal) ray angle. Distinguished from 'Kim's Knee High' by the white color and the taller stature (24–36 inches / 60–90 cm versus 18–24 inches / 45–60 cm). The white coneflower with slightly drooping white rays around a dark copper-orange cone is diagnostic.

Appearance

Size & Dimensions

Height2' - 3'
Width/Spread1'6" - 2'

Reaches mature size in approximately 2 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~9 weeks
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Single, daisy-like flower heads 3–4 inches (8–10 cm) across with white, slightly drooping ray florets and dark copper-orange cones in July–September. Bloom duration is 8–10 weeks. White rays may age to greenish or faintly pink.

Detailed Descriptions

Flower Description

White drooping rays; dark copper-orange to bronze cone

Foliage Description

Dark green, coarsely textured, rough sandpapery surface

Growing Conditions

Sun Requirements

Requires 6-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.5(Neutral)
357912
Soil Types
Drainagewell drained

Water & Climate

Water Needs

Low

Frost Tolerance

hardy

Time to Maturity

1-2 years

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Plant in full sun in well-drained soil. Tolerates heat, drought, humidity, and clay soils once established. Hardy to zone 3. Seed-grown—expect some color variation. Division every 3–4 years maintains vigor. Japanese beetles and aster yellows can occasionally affect plants.

Pruning

Deadhead spent flowers to extend bloom, or leave cones standing through winter for bird seed. Cut back all stems to the ground in late winter.

Pruning Schedule

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winter

Maintenance Level

very low

Container Growing

✓ Suitable for container growing

Minimum container size: 3 gallons

⚠️ Toxicity Warning

Non-toxic