Cold hardiness & minimum temperature

Is Souvenir de la Malmaison Rose (Rosa 'Souvenir de la Malmaison')cold hardy? Hardiness zone & min temp

Also called Souvenir de la Malmaison, Queen of Beauty and Fragrance.

More about souvenir de la malmaison rose

About Souvenir de la Malmaison Rose

Rosa 'Souvenir de la Malmaison' · also called Souvenir de la Malmaison, Queen of Beauty and Fragrance · flowering

Souvenir de la Malmaison is a classic Bourbon rose from 1843, prized for large, flat, quartered blush-pink blooms packed with petals and a rich, spicy old-rose fragrance. Repeat-flowering and available as bush or climbing forms, it performs best in warm, dry climates because its full flowers ball and spoil in persistent rain. Often nicknamed the Queen of Beauty and Fragrance.

Cold limit: USDA 6-9 (outdoor garden rose; limited winter hardiness) · RHS H5 (-18 to 32°C)

Watch for — Limited winter hardiness: Tender in colder zones; mulch the base heavily and choose a sheltered position in regions below zone 6.

What souvenir de la malmaison rose's hardiness rating actually means

Yes — souvenir de la malmaison rose is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (outdoor garden rose; limited winter hardiness), 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 (outdoor garden rose; limited winter hardiness) — 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. Souvenir de la Malmaison Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for souvenir de la malmaison 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 souvenir de la malmaison rose go outside or overwinter — and where?

Plant it out within USDA 6-9 (outdoor garden rose; limited winter hardiness) 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 souvenir de la malmaison rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Souvenir de la Malmaison Rose hardiness — frequently asked questions

Is souvenir de la malmaison rose cold hardy?

Yes — souvenir de la malmaison rose is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (outdoor garden rose; limited winter hardiness), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Souvenir de la Malmaison Rose is hardy across USDA 6-9 (outdoor garden rose; limited winter hardiness); 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 souvenir de la malmaison rose can survive?

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

What hardiness zone is souvenir de la malmaison rose?

Souvenir de la Malmaison Rose is rated USDA 6-9 (outdoor garden rose; limited winter hardiness) and RHS H5 — Hardy in most of the UK and in cold winters.

Can souvenir de la malmaison rose survive winter outside?

Plant it out within USDA 6-9 (outdoor garden rose; limited winter hardiness) 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 souvenir de la malmaison rose 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.