Cold hardiness & minimum temperature

Is Clematis recta (Clematis recta)cold hardy? Hardiness zone & min temp

Also called ground clematis, erect clematis.

More about clematis recta

About Clematis recta

Clematis recta · also called ground clematis, erect clematis · flowering

A herbaceous, non-climbing clematis forming an upright then sprawling clump topped with airy clouds of small, fragrant, star-shaped white flowers in early to midsummer, followed by fluffy seedheads. Cut to the ground in late winter (Group 3). Often grown for its froth of bloom in borders, with purple-leaved forms like 'Purpurea' especially prized.

Cold limit: USDA 3-7 · RHS H7 (-30 to 30°C)

What clematis recta's hardiness rating actually means

Yes — clematis recta is genuinely cold hardy. Rated RHS H7 and USDA 3-7, 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 3-7 — 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. Clematis recta is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for clematis recta 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 clematis recta go outside or overwinter — and where?

Plant it out within USDA 3-7 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 clematis recta can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Clematis recta hardiness — frequently asked questions

Is clematis recta cold hardy?

Yes — clematis recta is genuinely cold hardy. Rated RHS H7 and USDA 3-7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Clematis recta is hardy across USDA 3-7; 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 clematis recta can survive?

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

What hardiness zone is clematis recta?

Clematis recta is rated USDA 3-7 and RHS H7 — Hardy in the severest European continental winters.

Can clematis recta survive winter outside?

Plant it out within USDA 3-7 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 clematis recta 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.