Cold hardiness & minimum temperature

Is Roseraie de l'Hay Rose (Rosa 'Roseraie de l'Hay')cold hardy? Hardiness zone & min temp

Also called Roseraie de l'Hay, Rose de l'Hay.

More about roseraie de l'hay rose

About Roseraie de l'Hay Rose

Rosa 'Roseraie de l'Hay' · also called Roseraie de l'Hay, Rose de l'Hay · flowering

Roseraie de l'Hay is a robust rugosa shrub rose with large, loosely double, velvety wine-crimson blooms carrying a powerful clove fragrance, produced freely from summer into autumn. Vigorous, hardy and highly disease-resistant with handsome wrinkled foliage, it makes an outstanding scented specimen or informal hedge and tolerates poor, sandy and coastal soils.

Cold limit: USDA 3-9 · RHS H7 (-35 to 30°C)

What roseraie de l'hay rose's hardiness rating actually means

Yes — roseraie de l'hay rose is genuinely cold hardy. Rated RHS H7 and USDA 3-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA 3-9 — 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 below about −20 °C. Roseraie de l'Hay Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for roseraie de l'hay rose as it gets too cold:

It tolerates winter lows to about −20 °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 roseraie de l'hay rose go outside or overwinter — and where?

Plant it out within USDA 3-9 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 roseraie de l'hay rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Roseraie de l'Hay Rose hardiness — frequently asked questions

Is roseraie de l'hay rose cold hardy?

Yes — roseraie de l'hay rose is genuinely cold hardy. Rated RHS H7 and USDA 3-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Roseraie de l'Hay Rose is hardy across USDA 3-9; 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 roseraie de l'hay rose can survive?

Minimum survivable temperature is roughly below about −20 °C. Roseraie de l'Hay Rose is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is roseraie de l'hay rose?

Roseraie de l'Hay Rose is rated USDA 3-9 and RHS H7 — Hardy in the severest European continental winters.

Can roseraie de l'hay rose survive winter outside?

Plant it out within USDA 3-9 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 roseraie de l'hay rose below its minimum temperature?

It tolerates winter lows to about −20 °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.