Ornamentalherbaceous perennialStraightforward

Echinacea

Echinacea purpurea

A prairie perennial with a long late-summer season and seedheads worth leaving standing through winter for the birds. It is genuinely drought-tolerant once established and genuinely short-lived on wet winter soil, which is the trade the gardener is actually making.

Position: Full sun
Water: low demand
Drainage: Free-draining
Grows to: 60–120 cm × 40–50 cm
Hardiness: H7
Flowers: July to September
Difficulty: Straightforward

August

In flower

Coming next month: plant.

Echinacea’s year

Resolved for United Kingdom (general). Every window is stored against a climate event rather than a date, so a late frost pocket runs later than the band shows. What else August calls for.

Activity	J	F	M	A	M	J	J	A	S	O	N	D
Plant				April.	May.				September.
In flower							July.	August.	September.
Prune			March.

Timing that travels

The band above resolves this plant's windows into months for one region. These are the windows themselves, stored against a climate event rather than a date — which is the form that survives being carried to a colder garden, a frost pocket, or next year.

Conditions it needs

Light: Full sun
Frost: Very hardy
Hardiness rating: H7 (RHS)
Grows best at: 15–28 °C
Soil: Loam, Sandy, Chalky
Soil pH: 6–7.5
Drainage: Free-draining
Water needs: low
Drought: good tolerance
Waterlogging: poor tolerance
Heat: good tolerance
Wind and exposure: good tolerance

Where these figures come from

LightSourced guidancemoderate confidence

Royal Horticultural Society: Echinacea — position

Checked 2026-08-13

FrostSourced guidancehigh confidence

Royal Horticultural Society: Echinacea — hardiness

Checked 2026-08-13

Hardiness ratingSourced guidancemoderate confidence

Royal Horticultural Society: RHS hardiness ratings

Checked 2026-08-13

Grows best atSourced guidancemoderate confidence

Royal Horticultural Society: Echinacea — temperature

Checked 2026-08-13

SoilSourced guidancemoderate confidence

Royal Horticultural Society: Echinacea — soil

Checked 2026-08-13

Soil pHSourced guidancemoderate confidence

Plant Finder — Missouri Botanical Garden: Echinacea purpurea — culture

Checked 2026-08-13

DrainageSourced guidancemoderate confidence

Royal Horticultural Society: Echinacea — soil

Checked 2026-08-13

Water needsHorticultural consensusmoderate confidence

No external citation — see the evidence type above.

Checked 2026-08-13

DroughtHorticultural consensusmoderate confidence

Deep roots; established plants rarely need watering.

No external citation — see the evidence type above.

Checked 2026-08-13

WaterloggingHorticultural consensusmoderate confidence

Winter wet is what kills it, not winter cold.

No external citation — see the evidence type above.

Checked 2026-08-13

HeatHorticultural consensusmoderate confidence

No external citation — see the evidence type above.

Checked 2026-08-13

Wind and exposureHorticultural consensusmoderate confidence

No external citation — see the evidence type above.

Checked 2026-08-13

On your soil

Computed by comparing this plant's recorded requirements against each soil's recorded characteristics. A recorded horticultural fact overrides the comparison where GrowingHQ holds one.

Soil	Verdict	Why
Heavy clay	Works, with one condition	Echinacea will crop on heavy clay, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.
Sandy	Prefers this soil	Sandy suits Echinacea as it stands: The pH suits it: it wants 6 to 7.5, and this soil is in that range. The free drainage is exactly what it wants. Sandy soil is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Chalky and alkaline	Prefers this soil	Chalky and alkaline suits Echinacea as it stands: The free drainage is exactly what it wants. Chalky soil is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Loam	Prefers this soil	Loam suits Echinacea as it stands: The pH suits it: it wants 6 to 7.5, and this soil is in that range. The free drainage is exactly what it wants. Loam is among the soils it is recorded as suiting. The soil holds moisture, which saves a great deal of watering.
Silty	Prefers this soil	Silty suits Echinacea as it stands: The pH suits it: it wants 6 to 7.5, and this soil is in that range. The free drainage is exactly what it wants. The soil holds moisture, which saves a great deal of watering.
Peaty and acid	Works, with one condition	Echinacea will crop on peaty and acid, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.
Shallow over rock	Prefers this soil	Shallow over rock suits Echinacea as it stands: The free drainage is exactly what it wants. Loam is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Made ground and urban soil	Works, with one condition	Echinacea will crop on made ground and urban soil, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.

Not sure which you have? Four hand tests will settle it.

Space and spacing

Mature height: 60–120 cm
Mature spread: 40–50 cm
Rooting depth: 40 cm
Spacing: 45–60 cm apart

Where these figures come from

Mature heightHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
Mature spreadHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
Rooting depthHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
SpacingSourced guidancemoderate confidence: Royal Horticultural Society: Echinacea — spacing
Checked 2026-08-13

Measured centre to centre. Plants set closer than this compete for light and water long before they look crowded, and the crowding cannot be undone once they are in.

In a container

Minimum volume: 10 litres or more
Minimum depth: 35 cm

Where the container figures come from

Minimum volumeHorticultural consensusmoderate confidence: Plant Finder — Missouri Botanical Garden: Echinacea purpurea
Checked 2026-08-13
Minimum depthHorticultural consensusmoderate confidence: Plant Finder — Missouri Botanical Garden: Echinacea purpurea
Checked 2026-08-13

Possible in a large deep pot and rarely a long-term success — echinaceas are deep-rooted prairie plants and they are far more likely to be lost over winter in a container, where the compost stays cold and wet around the crown, than in open ground. If you do grow one in a pot, use a gritty loam-based compost, raise the pot on feet over winter, and treat it as a plant to be replaced every few years.

Where and how you can grow it

Each way of growing is assessed separately, and “not assessed” is a real answer rather than a gap we have filled in with a guess.

Method	Suitability	What it needs
Open ground	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13
Raised bed	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13
Container	Workable source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13

Growing it

PruningLeave the seedheads standing over winter. They hold their shape in frost and goldfinches feed on them, and cutting the plant down in autumn removes both without benefiting the plant.
PlantingPlant in spring rather than autumn on heavy soil. A young plant going into cold wet ground in October frequently does not appear again.
WateringWater through the first season to get it established and then only in a prolonged drought. Echinacea is a prairie plant with deep roots and it copes with dry summers well; what it does not cope with is winter wet, and a plant that vanished over the winter has almost always rotted rather than frozen. That is why autumn planting is a mixed recommendation for this one specifically — on heavy or wet soil, spring planting gives a young plant a full season to root before it has to survive a winter. Do not mulch over the crown.
FeedingDo not feed. Echinacea in rich, fed soil produces tall soft stems that fall over in the first summer storm, which is far and away the commonest complaint about it and is almost always a soil problem rather than a staking one. Poor, open, sunny ground gives shorter, self-supporting plants that flower just as well and live longer. If a clump is genuinely declining after several years the answer is division in spring, or a drier position, not fertiliser.

Where this guidance comes from

PruningSourced guidancemoderate confidence: Royal Horticultural Society: Echinacea — cultivation
Checked 2026-08-13
PlantingSourced guidancemoderate confidence: Royal Horticultural Society: Echinacea — planting
Checked 2026-08-13
WateringSourced guidancemoderate confidence: Plant Finder — Missouri Botanical Garden: Echinacea purpurea
Checked 2026-08-13
FeedingSourced guidancemoderate confidence: Plant Finder — Missouri Botanical Garden: Echinacea purpurea
Checked 2026-08-13

The bud you cut to becomes the new shoot, and it grows in the direction it points — which is why an outward-facing bud opens the plant up and an inward-facing one crosses the middle.

What goes wrong

Problem	How often	Notes
Slugs and snails	common source Horticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13
Spittlebug	common source Horticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13

Sources for this page

GrowingHQ editorial synthesis · Plant Finder · Royal Horticultural Society

Each figure on this page carries its own citation, under the “where these figures come from” note in its section. Record last reviewed 2026-08-14.