Cold hardiness & minimum temperature

Is Ringed Sage (Salvia ringens)cold hardy? Hardiness zone & min temp

Also called Ringed sage, Mount Olympus sage.

More about ringed sage

About Ringed Sage

Salvia ringens · also called Ringed sage, Mount Olympus sage · flowering

Salvia ringens is a cold-hardy herbaceous perennial native to the southern and eastern Balkans, with many colonies growing on Mount Olympus at altitudes up to 1,900 m. From a compact dark-green basal rosette, it sends up tall, wiry, branched spikes of striking deep violet and white two-lipped flowers from summer into autumn — the species name refers to the gaping, ringed appearance of these blooms. The most important care fact is that it needs full sun and sharp drainage but will tolerate dry periods better than wet feet. The ASPCA lists sage (Salvia) as non-toxic to cats and dogs.

Cold limit: USDA 6-9 · RHS H5 (-15°C to 35°C)

Watch for — Crown rot in wet winters: Despite its mountain hardiness, the crown is vulnerable to fungal rot if it sits in waterlogged soil over winter. Improve drainage before planting and avoid any mulch that retains moisture directly over the crown.

What ringed sage's hardiness rating actually means

Yes — ringed sage is genuinely cold hardy. Rated RHS H5 and USDA 6-9, 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 6-9 — 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. Ringed Sage is built for winter — once established it takes hard frost and snow in its stride.

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

Plant it out within USDA 6-9 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 ringed sage can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Ringed Sage hardiness — frequently asked questions

Is ringed sage cold hardy?

Yes — ringed sage is genuinely cold hardy. Rated RHS H5 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Ringed Sage is hardy across USDA 6-9; 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 ringed sage can survive?

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

What hardiness zone is ringed sage?

Ringed Sage is rated USDA 6-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can ringed sage survive winter outside?

Plant it out within USDA 6-9 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 ringed 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.