Cold hardiness & minimum temperature

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

Also called Flower Carpet Rose, Emera, Noatraum.

More about flower carpet rose

About Flower Carpet Rose

Rosa 'Flower Carpet' · also called Flower Carpet Rose, Emera · flowering

Flower Carpet is a low, spreading groundcover rose bred for outstanding disease resistance and a non-stop carpet of small blooms from late spring to autumn. Tough and low-maintenance, it suits banks, borders, mass plantings and large containers. Give it full sun and well-drained soil, shear it back hard in late winter, and it largely looks after itself.

Cold limit: USDA 5-10 (outdoor groundcover rose) · RHS H6 (-23 to 32°C)

Watch for — Leggy, bare centre over time: Without the recommended hard renewal pruning it thins and goes woody in the middle. Shear the whole plant back by about a third in late winter to keep it dense and floriferous.

What flower carpet rose's hardiness rating actually means

Yes — flower carpet rose is genuinely cold hardy. Rated RHS H6 and USDA 5-10 (outdoor groundcover rose), 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 5-10 (outdoor groundcover rose) — 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. Flower Carpet Rose is built for winter — once established it takes hard frost and snow in its stride.

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

Plant it out within USDA 5-10 (outdoor groundcover rose) 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 flower carpet rose can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Flower Carpet Rose hardiness — frequently asked questions

Is flower carpet rose cold hardy?

Yes — flower carpet rose is genuinely cold hardy. Rated RHS H6 and USDA 5-10 (outdoor groundcover rose), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Flower Carpet Rose is hardy across USDA 5-10 (outdoor groundcover rose); 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 flower carpet rose can survive?

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

What hardiness zone is flower carpet rose?

Flower Carpet Rose is rated USDA 5-10 (outdoor groundcover rose) and RHS H6 — Hardy throughout the UK and northern Europe.

Can flower carpet rose survive winter outside?

Plant it out within USDA 5-10 (outdoor groundcover rose) 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 flower carpet 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.