Cold hardiness & minimum temperature

Is Maries Doublefile Viburnum (Viburnum plicatum f. tomentosum 'Mariesii')cold hardy? Hardiness zone & min temp

Also called Mariesii Viburnum, Doublefile Viburnum, Japanese Snowball Bush.

More about maries doublefile viburnum

About Maries Doublefile Viburnum

Viburnum plicatum f. tomentosum 'Mariesii' · also called Mariesii Viburnum, Doublefile Viburnum · flowering

Maries Doublefile Viburnum is an elegant deciduous shrub with a strongly horizontal branching habit, smothered in flat-topped white lacecap flowerheads in late spring. Attractive pleated leaves turn burgundy in autumn, followed by red berries that ripen to black. An RHS Award of Garden Merit winner. Viburnum berries are toxic to pets if consumed in quantity.

Cold limit: USDA 5–8 · RHS H6 (−20 to 30°C)

Watch for — Viburnum beetle: Larvae skeletonise leaves in spring and early summer; remove egg clusters from twigs in winter or apply insecticide in spring at larval hatch.

What maries doublefile viburnum's hardiness rating actually means

Yes — maries doublefile viburnum is genuinely cold hardy. Rated RHS H6 and USDA 5–8, 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 5–8 — 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. Maries Doublefile Viburnum is built for winter — once established it takes hard frost and snow in its stride.

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

Plant it out within USDA 5–8 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 maries doublefile viburnum can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Maries Doublefile Viburnum hardiness — frequently asked questions

Is maries doublefile viburnum cold hardy?

Yes — maries doublefile viburnum is genuinely cold hardy. Rated RHS H6 and USDA 5–8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Maries Doublefile Viburnum is hardy across USDA 5–8; 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 maries doublefile viburnum can survive?

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

What hardiness zone is maries doublefile viburnum?

Maries Doublefile Viburnum is rated USDA 5–8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can maries doublefile viburnum survive winter outside?

Plant it out within USDA 5–8 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 maries doublefile 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.