Cold hardiness & minimum temperature

Is Red Prince Weigela (Weigela florida 'Red Prince')cold hardy? Hardiness zone & min temp

Also called Red Prince Weigela, Old-fashioned Weigela.

More about red prince weigela

About Red Prince Weigela

Weigela florida 'Red Prince' · also called Red Prince Weigela, Old-fashioned Weigela · flowering

Red Prince Weigela is a vigorous deciduous shrub bearing masses of rich crimson trumpet-shaped flowers in late spring, often repeating lightly in summer. It is easy to grow in most well-drained soils in full sun. No ASPCA toxic listing for Weigela — considered low-risk to pets.

Cold limit: USDA 4-8 · RHS H6 (-20 to 30°C)

Watch for — Scale insects: Brown bumps on stems cause sticky honeydew and sooty mould; treat with a winter oil spray when dormant.

What red prince weigela's hardiness rating actually means

Yes — red prince weigela 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. Red Prince Weigela is built for winter — once established it takes hard frost and snow in its stride.

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

Red Prince Weigela hardiness — frequently asked questions

Is red prince weigela cold hardy?

Yes — red prince weigela 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. Red Prince Weigela 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 red prince weigela can survive?

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

What hardiness zone is red prince weigela?

Red Prince Weigela is rated USDA 4-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can red prince weigela 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 red prince weigela 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.