Cold hardiness & minimum temperature

Is Sage-Leaved Rock Rose (Cistus salviifolius)cold hardy? Hardiness zone & min temp

Also called Sage-leaved rock rose, Sageleaf rockrose, Salvia cistus, Gallipoli rose.

More about sage-leaved rock rose

About Sage-Leaved Rock Rose

Cistus salviifolius · also called Sage-leaved rock rose, Sageleaf rockrose · flowering

Cistus salviifolius is a fast-growing, spreading evergreen shrub native to the Mediterranean Basin, from the Iberian Peninsula east to western Asia and North Africa. It thrives in full sun with excellent drainage, tolerating drought, poor soils, salt spray, and chalk — the single most important care fact is that it resents wet winters and rich soils, which quickly cause root rot and collapse. White, saucer-shaped flowers 4–6 cm across, each with five petals and a yellow basal spot, open from crimson buds in succession from late spring through early summer. Neither Cistus nor the Cistaceae family is listed by ASPCA as toxic to cats or dogs, though it is not formally on the ASPCA non-toxic list either; treat with caution and keep pets from eating large quantities.

Cold limit: USDA 8-10 · RHS H4 (-10 to 35°C)

Watch for — Root rot in wet or heavy soil: The most frequent killer. Waterlogged soil — especially over winter — causes rapid root and stem rot. Remedy: plant in gritty, free-draining soil on a slight slope or raised area, never mulch heavily, and avoid watering from late autumn through winter.

What sage-leaved rock rose's hardiness rating actually means

Yes — sage-leaved rock rose is genuinely cold hardy. Rated RHS H4 and USDA 8-10, 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 8-10 — 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. Sage-Leaved Rock Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for sage-leaved rock rose 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 sage-leaved rock rose go outside or overwinter — and where?

Plant it out within USDA 8-10 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 sage-leaved rock rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Sage-Leaved Rock Rose hardiness — frequently asked questions

Is sage-leaved rock rose cold hardy?

Yes — sage-leaved rock rose is genuinely cold hardy. Rated RHS H4 and USDA 8-10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Sage-Leaved Rock Rose is hardy across USDA 8-10; 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 sage-leaved rock rose can survive?

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

What hardiness zone is sage-leaved rock rose?

Sage-Leaved Rock Rose is rated USDA 8-10 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can sage-leaved rock rose survive winter outside?

Plant it out within USDA 8-10 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.

What happens to sage-leaved rock rose below its minimum temperature?

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.