Cold hardiness & minimum temperature

Is Barrelier's Sage (Salvia barrelieri)cold hardy? Hardiness zone & min temp

Also called Barrelier's Sage, North African Sage, Berber Clary.

More about barrelier's sage

About Barrelier's Sage

Salvia barrelieri · also called Barrelier's Sage, North African Sage · flowering

Barrelier's sage is a semi-deciduous herbaceous perennial native to northern Africa (Morocco, Algeria, Tunisia) and southwestern Spain, where it grows at elevations of 500–1,200m in sunny, well-drained habitats. It forms large basal rosettes of wavy grey-green leaves and sends up dramatic branching spikes of lavender-blue to sky-blue flowers in summer and autumn, which are excellent for cutting. The most important care fact is to provide excellent drainage and full sun, as it rots readily in heavy, wet soils. The ASPCA lists Salvia as non-toxic to cats and dogs.

Cold limit: USDA 7-10 · RHS H4 (-10–35°C)

What barrelier's sage's hardiness rating actually means

Yes — barrelier's sage is genuinely cold hardy. Rated RHS H4 and USDA 7-10, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 7-10 — 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 −10 to −5 °C. Barrelier's Sage is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for barrelier's sage as it gets too cold:

It tolerates winter lows to about −10 to −5 °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 barrelier's sage go outside or overwinter — and where?

Plant it out within USDA 7-10 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 barrelier's sage can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Frost protection for borderline barrelier's sage

Barrelier's Sage is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

At the cold edge of its range, mulch the root zone in late autumn to buffer the deepest freezes.
Protect container specimens — pots freeze through far faster than open ground, costing roughly a zone of hardiness.
Shelter new growth from late spring frosts with fleece if a hard night is forecast.

Barrelier's Sage hardiness — frequently asked questions

Is barrelier's sage cold hardy?

Yes — barrelier's sage is genuinely cold hardy. Rated RHS H4 and USDA 7-10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Barrelier's Sage is hardy across USDA 7-10; 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 barrelier's sage can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Barrelier's Sage is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is barrelier's sage?

Barrelier's Sage is rated USDA 7-10 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can barrelier's sage survive winter outside?

Plant it out within USDA 7-10 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.

How do I protect barrelier's sage from frost?

At the cold edge of its range, mulch the root zone in late autumn to buffer the deepest freezes. Protect container specimens — pots freeze through far faster than open ground, costing roughly a zone of hardiness. Shelter new growth from late spring frosts with fleece if a hard night is forecast.