Cold hardiness & minimum temperature

Is Clasping Sage (Salvia amplexicaulis)cold hardy? Hardiness zone & min temp

Also called Clasping Sage, Stem-Clasping Violet Sage, Macedonian Clary.

More about clasping sage

About Clasping Sage

Salvia amplexicaulis · also called Clasping Sage, Stem-Clasping Violet Sage · flowering

Clasping sage is a hardy deciduous perennial native to southeastern Europe (including Greece and the Balkans), producing erect branching spikes of deep violet-blue whorled flowers nestled within prominent reddish-purple bracts throughout summer. It grows in full sun to light partial shade in moist but well-drained moderately fertile soil. The most important care fact is to deadhead spent flower spikes regularly to extend the long summer flowering season. Salvia is considered non-toxic to cats and dogs by the ASPCA.

Cold limit: USDA 5-9 · RHS H5 (-20–30°C)

What clasping sage's hardiness rating actually means

Yes — clasping sage is genuinely cold hardy. Rated RHS H5 and USDA 5-9, 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 5-9 — 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 about −15 to −10 °C. Clasping Sage is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for clasping sage 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 clasping sage go outside or overwinter — and where?

Plant it out within USDA 5-9 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 clasping sage can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Clasping Sage hardiness — frequently asked questions

Is clasping sage cold hardy?

Yes — clasping sage is genuinely cold hardy. Rated RHS H5 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Clasping Sage is hardy across USDA 5-9; 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 clasping sage can survive?

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

What hardiness zone is clasping sage?

Clasping Sage is rated USDA 5-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can clasping sage survive winter outside?

Plant it out within USDA 5-9 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 clasping sage 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.