Cold hardiness & minimum temperature

Is Geranium clarkei 'Kashmir White' (Geranium clarkei 'Kashmir White')cold hardy? Hardiness zone & min temp

Also called Kashmir White cranesbill, Clarke's cranesbill white.

More about geranium clarkei 'kashmir white'

About Geranium clarkei 'Kashmir White'

Geranium clarkei 'Kashmir White' · also called Kashmir White cranesbill, Clarke's cranesbill white · flowering

Geranium clarkei 'Kashmir White' is a vigorous, spreading hardy cranesbill with finely divided, deeply cut foliage. In summer it carries large, saucer-shaped white flowers delicately pencilled with lilac-pink veins. Easygoing and reliable on most soils including clay, it makes excellent weed-suppressing ground cover for sun or partial shade in borders and informal plantings.

Cold limit: USDA 5-8 · RHS H5 (-15 to 24°C)

What geranium clarkei 'kashmir white''s hardiness rating actually means

Yes — geranium clarkei 'kashmir white' 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. Geranium clarkei 'Kashmir White' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for geranium clarkei 'kashmir white' 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 geranium clarkei 'kashmir white' 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 geranium clarkei 'kashmir white' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Geranium clarkei 'Kashmir White' hardiness — frequently asked questions

Is geranium clarkei 'kashmir white' cold hardy?

Yes — geranium clarkei 'kashmir white' 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. Geranium clarkei 'Kashmir White' 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 geranium clarkei 'kashmir white' can survive?

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

What hardiness zone is geranium clarkei 'kashmir white'?

Geranium clarkei 'Kashmir White' is rated USDA 5-8 and RHS H5 — Hardy in most of the UK and in cold winters.

Can geranium clarkei 'kashmir white' 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 geranium clarkei 'kashmir white' 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.