Cold hardiness & minimum temperature

Is Pink Coreopsis (Coreopsis rosea)cold hardy? Hardiness zone & min temp

Also called Pink Coreopsis, Rose Coreopsis, Pink Tickseed.

More about pink coreopsis

About Pink Coreopsis

Coreopsis rosea · also called Pink Coreopsis, Rose Coreopsis · flowering

Pink Coreopsis is a delicate, fine-textured perennial native to sandy, seasonally wet coastal plain habitats of the eastern US. Unique among coreopsis for its soft rose-pink flowers with yellow centres, it blooms from mid-summer to early autumn. Unlike most of its genus, it prefers consistently moist soils, making it ideal for rain gardens, pond margins, and low-lying borders.

Cold limit: USDA 4-9 · RHS H7 (-25–35°C)

What pink coreopsis's hardiness rating actually means

Yes — pink coreopsis is genuinely cold hardy. Rated RHS H7 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA 4-9 — 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 below about −20 °C. Pink Coreopsis is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for pink coreopsis as it gets too cold:

It tolerates winter lows to about −20 °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 pink coreopsis go outside or overwinter — and where?

Plant it out within USDA 4-9 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 pink coreopsis can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Pink Coreopsis hardiness — frequently asked questions

Is pink coreopsis cold hardy?

Yes — pink coreopsis is genuinely cold hardy. Rated RHS H7 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Pink Coreopsis is hardy across USDA 4-9; 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 pink coreopsis can survive?

Minimum survivable temperature is roughly below about −20 °C. Pink Coreopsis is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is pink coreopsis?

Pink Coreopsis is rated USDA 4-9 and RHS H7 — Hardy in the severest European continental winters.

Can pink coreopsis survive winter outside?

Plant it out within USDA 4-9 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 pink coreopsis below its minimum temperature?

It tolerates winter lows to about −20 °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.