Cold hardiness & minimum temperature

Is Echinacea 'Green Envy' (Echinacea purpurea 'Green Envy')cold hardy? Hardiness zone & min temp

Also called Green Envy coneflower, Green-centred purple coneflower.

More about echinacea 'green envy'

About Echinacea 'Green Envy'

Echinacea purpurea 'Green Envy' · also called Green Envy coneflower, Green-centred purple coneflower · flowering

Echinacea purpurea 'Green Envy' is an unusual coneflower cultivar with petals in shades of pale green flushed with rose-pink or purple, surrounding a large spiky green central cone. It grows 75-100 cm tall and blooms from midsummer into autumn. Long-lived, drought-tolerant, and highly attractive to bees and goldfinches.

Cold limit: USDA 3-8 · RHS H6 (5-28°C)

Watch for — Crown rot: Caused by poorly drained soil in winter. Ensure excellent drainage around the crown.

What echinacea 'green envy''s hardiness rating actually means

Yes — echinacea 'green envy' is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 3-8 — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about −20 to −15 °C. Echinacea 'Green Envy' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for echinacea 'green envy' as it gets too cold:

It tolerates winter lows to about −20 to −15 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can echinacea 'green envy' go outside or overwinter — and where?

Plant it out within USDA 3-8 and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when echinacea 'green envy' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Echinacea 'Green Envy' hardiness — frequently asked questions

Is echinacea 'green envy' cold hardy?

Yes — echinacea 'green envy' is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Echinacea 'Green Envy' is hardy across USDA 3-8; it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature echinacea 'green envy' can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Echinacea 'Green Envy' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is echinacea 'green envy'?

Echinacea 'Green Envy' is rated USDA 3-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can echinacea 'green envy' survive winter outside?

Plant it out within USDA 3-8 and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to echinacea 'green envy' below its minimum temperature?

It tolerates winter lows to about −20 to −15 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.