Cold hardiness & minimum temperature

Is Red Twig Dogwood 'Arctic Fire' (Cornus sericea 'Farrow')cold hardy? Hardiness zone & min temp

Also called Redtwig Dogwood, Red Osier Dogwood.

More about red twig dogwood 'arctic fire'

About Red Twig Dogwood 'Arctic Fire'

Cornus sericea 'Farrow' · also called Redtwig Dogwood, Red Osier Dogwood · flowering

'Arctic Fire' is a compact red osier dogwood grown for vivid red winter stems on a dwarf, suckering shrub roughly half the size of the species. White spring flower clusters give way to white berries, and green summer leaves turn reddish in fall. Tough and adaptable, it tolerates wet sites and is ideal for winter color and rain gardens.

Cold limit: USDA 3-7 · RHS H7 (-40 to 30°C)

Watch for — Dull stem color: Old stems lose their bright red and shading reduces intensity. Cut roughly a third of the oldest stems to the ground each late winter to renew vivid young growth, and grow in full sun.

What red twig dogwood 'arctic fire''s hardiness rating actually means

Yes — red twig dogwood 'arctic fire' is genuinely cold hardy. Rated RHS H7 and USDA 3-7, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA 3-7 — 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 below about −20 °C. Red Twig Dogwood 'Arctic Fire' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for red twig dogwood 'arctic fire' as it gets too cold:

It tolerates winter lows to about −20 °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 red twig dogwood 'arctic fire' go outside or overwinter — and where?

Plant it out within USDA 3-7 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 red twig dogwood 'arctic fire' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Red Twig Dogwood 'Arctic Fire' hardiness — frequently asked questions

Is red twig dogwood 'arctic fire' cold hardy?

Yes — red twig dogwood 'arctic fire' is genuinely cold hardy. Rated RHS H7 and USDA 3-7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Red Twig Dogwood 'Arctic Fire' is hardy across USDA 3-7; 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 red twig dogwood 'arctic fire' can survive?

Minimum survivable temperature is roughly below about −20 °C. Red Twig Dogwood 'Arctic Fire' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is red twig dogwood 'arctic fire'?

Red Twig Dogwood 'Arctic Fire' is rated USDA 3-7 and RHS H7 — Hardy in the severest European continental winters.

Can red twig dogwood 'arctic fire' survive winter outside?

Plant it out within USDA 3-7 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 red twig dogwood 'arctic fire' below its minimum temperature?

It tolerates winter lows to about −20 °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.