Cold hardiness & minimum temperature

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

Also called Trumpeter, MACtrump.

More about trumpeter rose

About Trumpeter Rose

Rosa 'Trumpeter' · also called Trumpeter, MACtrump · flowering

Trumpeter is a compact McGredy floribunda that blazes with clusters of vivid orange-red, ruffled double blooms over glossy, disease-resistant foliage. It flowers prolifically and almost non-stop from early summer to frost with little fragrance. Low and bushy, it excels in beds, edging and containers. Roses are pet-safe, so cats and dogs face no toxicity risk nearby.

Cold limit: USDA 5-9 (garden-hardy) · RHS H6 (15-26°C)

Watch for — Stem dieback in hard winters: At the cold edge of its range, protect the base with mulch and prune out dead wood in spring.

What trumpeter rose's hardiness rating actually means

Yes — trumpeter rose is genuinely cold hardy. Rated RHS H6 and USDA 5-9 (garden-hardy), 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 (garden-hardy) — 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. Trumpeter Rose is built for winter — once established it takes hard frost and snow in its stride.

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

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

Trumpeter Rose hardiness — frequently asked questions

Is trumpeter rose cold hardy?

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

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

What hardiness zone is trumpeter rose?

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

Can trumpeter rose survive winter outside?

Plant it out within USDA 5-9 (garden-hardy) 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 trumpeter 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.