Cold hardiness & minimum temperature

Is Physocarpus opulifolius 'Center Glow' (Physocarpus opulifolius 'Center Glow')cold hardy? Hardiness zone & min temp

Also called Center Glow ninebark, bi-color ninebark.

More about physocarpus opulifolius 'center glow'

About Physocarpus opulifolius 'Center Glow'

Physocarpus opulifolius 'Center Glow' · also called Center Glow ninebark, bi-color ninebark · flowering

Center Glow ninebark is a tough deciduous shrub prized for foliage that emerges golden-red with a glowing yellow centre, maturing to deep burgundy. Pinkish-white spring flower clusters draw pollinators, followed by red seed capsules. Extremely hardy and adaptable, it suits sunny borders and hedges in almost any soil, needing minimal care once established.

Cold limit: USDA 3-7 · RHS H7 (-37 to 32°C)

What physocarpus opulifolius 'center glow''s hardiness rating actually means

Yes — physocarpus opulifolius 'center glow' 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. Physocarpus opulifolius 'Center Glow' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for physocarpus opulifolius 'center glow' 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 physocarpus opulifolius 'center glow' 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 physocarpus opulifolius 'center glow' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Physocarpus opulifolius 'Center Glow' hardiness — frequently asked questions

Is physocarpus opulifolius 'center glow' cold hardy?

Yes — physocarpus opulifolius 'center glow' 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. Physocarpus opulifolius 'Center Glow' 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 physocarpus opulifolius 'center glow' can survive?

Minimum survivable temperature is roughly below about −20 °C. Physocarpus opulifolius 'Center Glow' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is physocarpus opulifolius 'center glow'?

Physocarpus opulifolius 'Center Glow' is rated USDA 3-7 and RHS H7 — Hardy in the severest European continental winters.

Can physocarpus opulifolius 'center glow' 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 physocarpus opulifolius 'center glow' 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.