Cold hardiness & minimum temperature

Is Arrowwood Viburnum (Viburnum dentatum)cold hardy? Hardiness zone & min temp

Also called arrowwood viburnum.

More about arrowwood viburnum

About Arrowwood Viburnum

Viburnum dentatum · also called arrowwood viburnum · flowering

Arrowwood is a vigorous, adaptable native shrub with flat white spring flowers, blue-black berries loved by birds, and reliable red-to-purple autumn colour. It thrives in sun or part shade across a wide range of soils, including wet and clay ground. Dense and rounded, it makes an excellent hedge, screen, or wildlife planting with minimal care.

Cold limit: USDA 3-8 · RHS H6 (-34 to 35°C)

Watch for — Viburnum leaf beetle: Arrowwood is a preferred host; larvae skeletonise leaves in spring. Inspect and prune off egg-bearing twig tips in late winter and treat young larvae if needed.

What arrowwood viburnum's hardiness rating actually means

Yes — arrowwood viburnum is genuinely cold hardy. Rated RHS H6 and USDA 3-8, 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 3-8 — 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. Arrowwood Viburnum is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for arrowwood viburnum 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 arrowwood viburnum go outside or overwinter — and where?

Plant it out within USDA 3-8 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 arrowwood viburnum can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Arrowwood Viburnum hardiness — frequently asked questions

Is arrowwood viburnum cold hardy?

Yes — arrowwood viburnum is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Arrowwood Viburnum is hardy across USDA 3-8; 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 arrowwood viburnum can survive?

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

What hardiness zone is arrowwood viburnum?

Arrowwood Viburnum is rated USDA 3-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can arrowwood viburnum survive winter outside?

Plant it out within USDA 3-8 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 arrowwood viburnum 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.