Cold hardiness & minimum temperature

Is Purple Cyclamen (Cyclamen purpurascens)cold hardy? Hardiness zone & min temp

Also called Purple cyclamen, European cyclamen, Sowbread.

More about purple cyclamen

About Purple Cyclamen

Cyclamen purpurascens · also called Purple cyclamen, European cyclamen · flowering

Native to central Europe from the Alps east through the Balkans, Cyclamen purpurascens is one of the hardiest and most fragrant cyclamen species, producing sweetly scented rosy-pink to purple flowers from midsummer through autumn. Unlike most cyclamen it remains evergreen, retaining its attractive silver-marbled, heart-shaped leaves year-round. The single most important care fact is to keep it relatively dry in summer — excess moisture during dormancy will rot the tuber. All parts of the plant are toxic to cats and dogs.

Cold limit: USDA 5-8 · RHS H5 (-15 to 20°C)

What purple cyclamen's hardiness rating actually means

Yes — purple cyclamen is genuinely cold hardy. Rated RHS H5 and USDA 5-8, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. 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 −15 to −10 °C. Purple Cyclamen is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for purple cyclamen as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 purple cyclamen 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 purple cyclamen can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Purple Cyclamen hardiness — frequently asked questions

Is purple cyclamen cold hardy?

Yes — purple cyclamen is genuinely cold hardy. Rated RHS H5 and USDA 5-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Purple Cyclamen 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 purple cyclamen can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Purple Cyclamen is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is purple cyclamen?

Purple Cyclamen is rated USDA 5-8 and RHS H5 — Hardy in most of the UK and in cold winters.

Can purple cyclamen 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 purple cyclamen below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.