Cold hardiness & minimum temperature

Is Grape 'Himrod' (Vitis vinifera × labrusca 'Himrod')cold hardy? Hardiness zone & min temp

Also called Himrod seedless grape.

More about grape 'himrod'

About Grape 'Himrod'

Vitis vinifera × labrusca 'Himrod' · also called Himrod seedless grape · edible

'Himrod' is an early-ripening seedless white table grape released by Cornell's Geneva station in 1952 (Ontario × Thompson Seedless). This labrusca-influenced hybrid bears loose clusters of crisp, honey-sweet amber berries. Vigorous and cold-hardy to USDA zone 5, it needs a sunny wall, sturdy support and annual cane pruning to crop well.

Cold limit: USDA 5-8 (outdoor temperate) · RHS H5 (15-30°C growing; hardy to about -25°C dormant)

Watch for — Black rot: Small brown leaf lesions then shrivelled, mummified berries. Strip and bin mummies, clear fallen debris over winter, and prune for airflow to break the cycle.

What grape 'himrod''s hardiness rating actually means

Yes — grape 'himrod' is genuinely cold hardy. Rated RHS H5 and USDA 5-8 (outdoor temperate), 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 5-8 (outdoor temperate) — 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. Grape 'Himrod' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for grape 'himrod' 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 grape 'himrod' go outside or overwinter — and where?

Plant it out within USDA 5-8 (outdoor temperate) 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 grape 'himrod' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Grape 'Himrod' hardiness — frequently asked questions

Is grape 'himrod' cold hardy?

Yes — grape 'himrod' is genuinely cold hardy. Rated RHS H5 and USDA 5-8 (outdoor temperate), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Grape 'Himrod' is hardy across USDA 5-8 (outdoor temperate); 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 grape 'himrod' can survive?

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

What hardiness zone is grape 'himrod'?

Grape 'Himrod' is rated USDA 5-8 (outdoor temperate) and RHS H5 — Hardy in most of the UK and in cold winters.

Can grape 'himrod' survive winter outside?

Plant it out within USDA 5-8 (outdoor temperate) 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 grape 'himrod' 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.