Cold hardiness & minimum temperature

Is Dalmatian Cranesbill (Geranium dalmaticum)cold hardy? Hardiness zone & min temp

Also called Dalmatian Cranesbill, Dalmatian Geranium.

More about dalmatian cranesbill

About Dalmatian Cranesbill

Geranium dalmaticum · also called Dalmatian Cranesbill, Dalmatian Geranium · flowering

Geranium dalmaticum is a dwarf semi-evergreen perennial native to the limestone mountains of the former Dalmatia region (present-day Croatia and Albania), forming neat, glossy-leaved mats that turn rich shades of orange and red in autumn. Soft pink flowers are borne above the foliage from late spring to early summer. It received the RHS Award of Garden Merit and is one of the best low-growing cranesbills for rock gardens, wall tops, and container edging. True Geranium species are non-toxic to cats and dogs per ASPCA guidance.

Cold limit: USDA 4-8 · RHS H6 (-20 to 25°C)

Watch for — Root rot in waterlogged soil: The plant's native limestone habitat means it is intolerant of wet, poorly drained positions; ensure excellent drainage year-round, particularly in winter — raised alpine beds and wall top plantings are ideal.

What dalmatian cranesbill's hardiness rating actually means

Yes — dalmatian cranesbill 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. Dalmatian Cranesbill is built for winter — once established it takes hard frost and snow in its stride.

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

Dalmatian Cranesbill hardiness — frequently asked questions

Is dalmatian cranesbill cold hardy?

Yes — dalmatian cranesbill 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. Dalmatian Cranesbill 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 dalmatian cranesbill can survive?

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

What hardiness zone is dalmatian cranesbill?

Dalmatian Cranesbill is rated USDA 4-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can dalmatian cranesbill 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 dalmatian cranesbill 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.