Cold hardiness & minimum temperature

Is White Periwinkle (Vinca minor 'Alba')cold hardy? Hardiness zone & min temp

Also called White Periwinkle, White Lesser Periwinkle, Alba Periwinkle.

More about white periwinkle

About White Periwinkle

Vinca minor 'Alba' · also called White Periwinkle, White Lesser Periwinkle · flowering

White Periwinkle is the pure white-flowered cultivar of Vinca minor, offering the same vigorous, trailing, shade-tolerant groundcover habit with clean white pinwheel blooms from spring through early summer. The white flowers provide striking contrast against dark glossy foliage and brighten shaded corners of the garden. Care requirements are identical to the species.

Cold limit: USDA 4–9 · RHS H7 (-20°C to 32°C)

What white periwinkle's hardiness rating actually means

Yes — white periwinkle is genuinely cold hardy. Rated RHS H7 and USDA 4–9, 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 4–9 — 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. White Periwinkle is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for white periwinkle 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 white periwinkle go outside or overwinter — and where?

Plant it out within USDA 4–9 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 white periwinkle can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

White Periwinkle hardiness — frequently asked questions

Is white periwinkle cold hardy?

Yes — white periwinkle is genuinely cold hardy. Rated RHS H7 and USDA 4–9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. White Periwinkle is hardy across USDA 4–9; 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 white periwinkle can survive?

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

What hardiness zone is white periwinkle?

White Periwinkle is rated USDA 4–9 and RHS H7 — Hardy in the severest European continental winters.

Can white periwinkle survive winter outside?

Plant it out within USDA 4–9 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 white periwinkle 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.