Cold hardiness & minimum temperature

Is Harlow Carr Rose (Rosa 'Harlow Carr')cold hardy? Hardiness zone & min temp

Also called Harlow Carr, Aushouse.

More about harlow carr rose

About Harlow Carr Rose

Rosa 'Harlow Carr' · also called Harlow Carr, Aushouse · flowering

Harlow Carr (Aushouse) is a David Austin English shrub rose named for the RHS Yorkshire garden. Pure warm-pink, perfectly formed rosette blooms with a strong Old Rose fragrance appear in generous flushes. Forming a dense, healthy, rounded bush around 1.1m, it is one of the most disease-resistant English roses and excels as a hedge, in borders or in containers.

Cold limit: USDA 5-9 (hardy shrub) · RHS H6 (-23 to 30°C)

What harlow carr rose's hardiness rating actually means

Yes — harlow carr rose is genuinely cold hardy. Rated RHS H6 and USDA 5-9 (hardy shrub), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 5-9 (hardy shrub) — 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 −20 to −15 °C. Harlow Carr Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for harlow carr rose as it gets too cold:

It tolerates winter lows to about −20 to −15 °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 harlow carr rose go outside or overwinter — and where?

Plant it out within USDA 5-9 (hardy shrub) 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 harlow carr rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Harlow Carr Rose hardiness — frequently asked questions

Is harlow carr rose cold hardy?

Yes — harlow carr rose is genuinely cold hardy. Rated RHS H6 and USDA 5-9 (hardy shrub), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Harlow Carr Rose is hardy across USDA 5-9 (hardy shrub); 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 harlow carr rose can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Harlow Carr Rose is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is harlow carr rose?

Harlow Carr Rose is rated USDA 5-9 (hardy shrub) and RHS H6 — Hardy throughout the UK and northern Europe.

Can harlow carr rose survive winter outside?

Plant it out within USDA 5-9 (hardy shrub) 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 harlow carr rose below its minimum temperature?

It tolerates winter lows to about −20 to −15 °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.