Cold hardiness & minimum temperature

Is Jewel Strawberry (Fragaria × ananassa 'Jewel')cold hardy? Hardiness zone & min temp

Also called Jewel Strawberry.

More about jewel strawberry

About Jewel Strawberry

Fragaria × ananassa 'Jewel' · also called Jewel Strawberry · edible

Jewel is a midseason June-bearing strawberry bred in New York, widely regarded as one of the best-flavoured fresh-market cultivars in the northeastern US and UK. It produces large, glossy, symmetrical red berries with excellent sweetness and a classic strawberry aroma. Cold-hardy and vigorous, it suits home gardens and U-pick operations in temperate climates.

Cold limit: USDA 4–8 · RHS H6 (-20–28°C (chill requirement 200–400 hours below 7°C; optimal fruiting 15–22°C))

What jewel strawberry's hardiness rating actually means

Yes — jewel strawberry is genuinely cold hardy. Rated RHS H6 and USDA 4–8, 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 4–8 — 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. Jewel Strawberry is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for jewel strawberry 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 jewel strawberry go outside or overwinter — and where?

Plant it out within USDA 4–8 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 jewel strawberry can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Jewel Strawberry hardiness — frequently asked questions

Is jewel strawberry cold hardy?

Yes — jewel strawberry is genuinely cold hardy. Rated RHS H6 and USDA 4–8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Jewel Strawberry is hardy across USDA 4–8; 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 jewel strawberry can survive?

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

What hardiness zone is jewel strawberry?

Jewel Strawberry is rated USDA 4–8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can jewel strawberry survive winter outside?

Plant it out within USDA 4–8 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 jewel strawberry 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.