Cold hardiness & minimum temperature

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

Also called Laurel-leaved rock rose, Laurel-leaf cistus, Laurel rock rose.

More about laurel-leaved rock rose

About Laurel-Leaved Rock Rose

Cistus laurifolius · also called Laurel-leaved rock rose, Laurel-leaf cistus · flowering

Cistus laurifolius is the hardiest species in the genus, native to the mountains and foothills of the western Mediterranean — Spain, southern France, Italy, and North Africa — where it grows on dry slopes at higher altitudes than most other cistus. It forms a large, vigorous evergreen shrub with leathery dark green leaves (resembling bay laurel) and a prolific display of white, bowl-shaped flowers with a central tuft of golden stamens in early summer; on hot days the foliage releases a pleasant incense-like fragrance. Its exceptional cold hardiness (to approximately -18°C, USDA zone 7) makes it the best choice for colder UK gardens. No toxic principles are documented for the Cistus genus.

Cold limit: USDA 7-10 · RHS H5 (-18–35°C)

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

Yes — laurel-leaved rock rose is genuinely cold hardy. Rated RHS H5 and USDA 7-10, 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 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 −15 to −10 °C. Laurel-Leaved Rock Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for laurel-leaved rock rose 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 laurel-leaved rock rose 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 laurel-leaved rock rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Frost protection for borderline laurel-leaved rock rose

Laurel-Leaved Rock Rose 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.

Laurel-Leaved Rock Rose hardiness — frequently asked questions

Is laurel-leaved rock rose cold hardy?

Yes — laurel-leaved rock rose is genuinely cold hardy. Rated RHS H5 and USDA 7-10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Laurel-Leaved Rock Rose 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 laurel-leaved rock rose can survive?

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

What hardiness zone is laurel-leaved rock rose?

Laurel-Leaved Rock Rose is rated USDA 7-10 and RHS H5 — Hardy in most of the UK and in cold winters.

Can laurel-leaved rock rose 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 laurel-leaved rock rose 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.