Cold hardiness & minimum temperature

Is Alpine Cinquefoil (Potentilla crantzii)cold hardy? Hardiness zone & min temp

Also called Alpine Cinquefoil, Crantz's Cinquefoil.

More about alpine cinquefoil

About Alpine Cinquefoil

Potentilla crantzii · also called Alpine Cinquefoil, Crantz's Cinquefoil · flowering

Potentilla crantzii is a neat, clump-forming alpine cinquefoil found across the mountains of Europe and western Asia, bearing cheerful golden-yellow flowers with a distinctive orange basal spot on each petal from late spring to midsummer. It is highly adaptable, thriving in rocky grassland, scree, and cliff habitats — a reliable, low-maintenance plant for rock gardens and alpine troughs.

Cold limit: USDA 3–8 · RHS H7 (-25–25°C)

Watch for — Root rot in winter wet: While extremely frost-hardy, P. crantzii is intolerant of prolonged waterlogging, particularly in winter. Plant in raised beds, rock garden pockets, or gritty troughs to ensure free drainage year-round. In heavy-rainfall climates, a winter pane of glass over potted specimens is beneficial.

What alpine cinquefoil's hardiness rating actually means

Yes — alpine cinquefoil is genuinely cold hardy. Rated RHS H7 and USDA 3–8, 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 3–8 — 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. Alpine Cinquefoil is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for alpine cinquefoil 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 alpine cinquefoil go outside or overwinter — and where?

Plant it out within USDA 3–8 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 alpine cinquefoil can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Alpine Cinquefoil hardiness — frequently asked questions

Is alpine cinquefoil cold hardy?

Yes — alpine cinquefoil is genuinely cold hardy. Rated RHS H7 and USDA 3–8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Alpine Cinquefoil is hardy across USDA 3–8; 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 alpine cinquefoil can survive?

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

What hardiness zone is alpine cinquefoil?

Alpine Cinquefoil is rated USDA 3–8 and RHS H7 — Hardy in the severest European continental winters.

Can alpine cinquefoil survive winter outside?

Plant it out within USDA 3–8 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 alpine cinquefoil 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.