Cold hardiness & minimum temperature

Is Cornelian Cherry Dogwood (Cornus mas)cold hardy? Hardiness zone & min temp

Also called cornelian cherry, cornelian cherry dogwood.

More about cornelian cherry dogwood

About Cornelian Cherry Dogwood

Cornus mas · also called cornelian cherry, cornelian cherry dogwood · edible

Cornelian cherry is a tough, early-flowering dogwood grown for both ornament and fruit. Clusters of bright yellow flowers open on bare stems in late winter, well before leaves, then ripen to glossy red, tart-sweet edible cherries used for preserves, syrups, and liqueurs. It is adaptable, drought-tolerant once established, and far more forgiving than most dogwoods.

Cold limit: USDA 4-8 · RHS H6 (-29 to 30°C)

Watch for — Uneven fruit ripening / drop: Fruit ripens unevenly and drops when fully soft. Harvest the firmer, fully colored fruit for cooking, or net the ground to collect drops; tart fruit sweetens after frost or storage.

What cornelian cherry dogwood's hardiness rating actually means

Yes — cornelian cherry dogwood 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. Cornelian Cherry Dogwood is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for cornelian cherry dogwood 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 cornelian cherry dogwood 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 cornelian cherry dogwood can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Cornelian Cherry Dogwood hardiness — frequently asked questions

Is cornelian cherry dogwood cold hardy?

Yes — cornelian cherry dogwood 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. Cornelian Cherry Dogwood 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 cornelian cherry dogwood can survive?

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

What hardiness zone is cornelian cherry dogwood?

Cornelian Cherry Dogwood is rated USDA 4-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can cornelian cherry dogwood 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 cornelian cherry dogwood 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.