Cold hardiness & minimum temperature

Is Raspberries (Rubus idaeus)cold hardy? Hardiness zone & min temp

Also called red raspberry, summer raspberry, autumn raspberry.

About Raspberries

Rubus idaeus · also called red raspberry, summer raspberry · edible

Raspberries are vigorous cane fruits grown on either summer-fruiting (biennial canes) or autumn-fruiting (current-year canes) varieties. They tolerate cool climates well and crop heavily on a 1.2 m post-and-wire framework. Pet-safe; fruit and foliage are non-toxic.

Red raspberry, Rubus idaeus, is native to Europe and northern Asia (Eurasia); it grows from a perennial root system that throws up biennial canes, naturally colonising woodland edges and clearings via suckers.

Summer-bearing types fruit on second-year floricanes for one midsummer crop; everbearing/primocane-fruiting types also crop on first-year canes in late summer and autumn, allowing a simple mow-everything-down pruning approach.

Cold limit: USDA 3-9 (varies by cultivar) · RHS H6 (13-24°C)

Sources: en.wikipedia.org, missouribotanicalgarden.org

What raspberries's hardiness rating actually means

Yes — raspberries is genuinely cold hardy. Rated RHS H6 and USDA 3-9 (varies by cultivar), 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 3-9 (varies by cultivar) — 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. Raspberries is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for raspberries 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 raspberries go outside or overwinter — and where?

Plant it out within USDA 3-9 (varies by cultivar) 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 raspberries can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Raspberries hardiness — frequently asked questions

Is raspberries cold hardy?

Yes — raspberries is genuinely cold hardy. Rated RHS H6 and USDA 3-9 (varies by cultivar), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Raspberries is hardy across USDA 3-9 (varies by cultivar); 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 raspberries can survive?

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

What hardiness zone is raspberries?

Raspberries is rated USDA 3-9 (varies by cultivar) and RHS H6 — Hardy throughout the UK and northern Europe.

Can raspberries survive winter outside?

Plant it out within USDA 3-9 (varies by cultivar) 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 raspberries 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.