Cold hardiness & minimum temperature

Is Lingonberry 'Koralle' (Vaccinium vitis-idaea 'Koralle')cold hardy? Hardiness zone & min temp

Also called Koralle lingonberry.

More about lingonberry 'koralle'

About Lingonberry 'Koralle'

Vaccinium vitis-idaea 'Koralle' · also called Koralle lingonberry · edible

'Koralle' is a heavy-cropping, ornamental lingonberry cultivar from the Netherlands, valued for abundant glossy red berries and a compact, tidy habit. Like the species it is a low evergreen subshrub needing acidic, peaty, free-draining soil and cool conditions. It is self-fertile and typically fruits twice, in summer and again in autumn.

Cold limit: USDA 2-8 · RHS H7 (-40 to 25°C)

What lingonberry 'koralle''s hardiness rating actually means

Yes — lingonberry 'koralle' is genuinely cold hardy. Rated RHS H7 and USDA 2-8, 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 2-8 — 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 below about −20 °C. Lingonberry 'Koralle' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for lingonberry 'koralle' 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 lingonberry 'koralle' go outside or overwinter — and where?

Plant it out within USDA 2-8 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 lingonberry 'koralle' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Lingonberry 'Koralle' hardiness — frequently asked questions

Is lingonberry 'koralle' cold hardy?

Yes — lingonberry 'koralle' is genuinely cold hardy. Rated RHS H7 and USDA 2-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Lingonberry 'Koralle' is hardy across USDA 2-8; 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 lingonberry 'koralle' can survive?

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

What hardiness zone is lingonberry 'koralle'?

Lingonberry 'Koralle' is rated USDA 2-8 and RHS H7 — Hardy in the severest European continental winters.

Can lingonberry 'koralle' survive winter outside?

Plant it out within USDA 2-8 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 lingonberry 'koralle' 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.