Cold hardiness & minimum temperature

Is Double Delight Rose (Rosa 'Double Delight')cold hardy? Hardiness zone & min temp

Also called Double Delight Rose.

More about double delight rose

About Double Delight Rose

Rosa 'Double Delight' · also called Double Delight Rose · flowering

Double Delight is a striking hybrid tea whose creamy-white blooms develop strawberry-red edges that deepen with sun exposure, so no two flowers look alike. It carries a strong, spicy fragrance on a bushy, branching plant. Highly rewarding and free-flowering, though somewhat prone to mildew, it is a long-time exhibition and garden favourite.

Cold limit: USDA 5-9 · RHS H6 (16-27°C)

What double delight rose's hardiness rating actually means

Yes — double delight rose is genuinely cold hardy. Rated RHS H6 and USDA 5-9, 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 — 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. Double Delight Rose is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for double delight 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 double delight rose go outside or overwinter — and where?

Plant it out within USDA 5-9 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 double delight rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Double Delight Rose hardiness — frequently asked questions

Is double delight rose cold hardy?

Yes — double delight rose is genuinely cold hardy. Rated RHS H6 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Double Delight Rose is hardy across USDA 5-9; 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 double delight rose can survive?

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

What hardiness zone is double delight rose?

Double Delight Rose is rated USDA 5-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can double delight rose survive winter outside?

Plant it out within USDA 5-9 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 double delight 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.