Cold hardiness & minimum temperature

Is Canadice Grape (Vitis labrusca 'Canadice')cold hardy? Hardiness zone & min temp

Also called Canadice grape, seedless red grape.

More about canadice grape

About Canadice Grape

Vitis labrusca 'Canadice' · also called Canadice grape, seedless red grape · edible

Canadice is a hardy seedless red American grape with tight clusters of small, sweet, spicy-flavoured berries and a hint of the classic 'foxy' labrusca aroma. It is a vigorous deciduous woody vine, cold-tolerant and disease-resistant, ripening early in the season. Grow it in full sun on a sturdy trellis with deep, free-draining soil and annual dormant pruning.

Cold limit: USDA 4-8 (notably cold-hardy) · RHS H5 (15-30°C)

What canadice grape's hardiness rating actually means

Yes — canadice grape is genuinely cold hardy. Rated RHS H5 and USDA 4-8 (notably cold-hardy), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 4-8 (notably cold-hardy) — 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 −15 to −10 °C. Canadice Grape is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for canadice grape as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 canadice grape go outside or overwinter — and where?

Plant it out within USDA 4-8 (notably cold-hardy) 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 canadice grape can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Canadice Grape hardiness — frequently asked questions

Is canadice grape cold hardy?

Yes — canadice grape is genuinely cold hardy. Rated RHS H5 and USDA 4-8 (notably cold-hardy), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Canadice Grape is hardy across USDA 4-8 (notably cold-hardy); 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 canadice grape can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Canadice Grape is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is canadice grape?

Canadice Grape is rated USDA 4-8 (notably cold-hardy) and RHS H5 — Hardy in most of the UK and in cold winters.

Can canadice grape survive winter outside?

Plant it out within USDA 4-8 (notably cold-hardy) 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 canadice grape below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.