Cold hardiness & minimum temperature

Is Sedum (Sedum)cold hardy? Hardiness zone & min temp

Also called stonecrop, burro’s tail, jelly bean plant.

About Sedum

Sedum · also called stonecrop, burro’s tail · houseplant

Sedum is a large genus of succulents ranging from trailing burro’s tail to upright autumn-flowering border plants. Indoor types want bright light and infrequent watering. Hardy garden types like Sedum spectabile thrive outdoors in temperate climates. Pet-safe by ASPCA standards.

Sedum (stonecrop) are succulents found on rocky outcrops, walls, bluff ledges and lean dry soils across the Northern Hemisphere; the genus gave its name to Crassulacean Acid Metabolism (CAM), the night-time CO2 fixation that lets them survive on minimal water.

A diverse genus spanning hardy mat-forming groundcovers (many fully frost-hardy) to tender succulents; note Missouri natives like S. ternatum prefer damp shaded ledges, so hardiness and moisture needs vary widely by species.

Cold limit: USDA 3-9 (varies widely by species) · RHS H5-H7 for hardy border types; H1c for indoor types like burro’s tail (15-27°C)

Sources: rhs.org.uk, missouribotanicalgarden.org

What sedum's hardiness rating actually means

Yes — sedum is genuinely cold hardy. Rated RHS H5 and USDA 3-9 (varies widely by species), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 3-9 (varies widely by species) — 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 −15 to −10 °C. Sedum is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for sedum as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 sedum go outside or overwinter — and where?

Plant it out within USDA 3-9 (varies widely by species) 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 sedum can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Sedum hardiness — frequently asked questions

Is sedum cold hardy?

Yes — sedum is genuinely cold hardy. Rated RHS H5 and USDA 3-9 (varies widely by species), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Sedum is hardy across USDA 3-9 (varies widely by species); 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 sedum can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Sedum is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is sedum?

Sedum is rated USDA 3-9 (varies widely by species) and RHS H5 — Hardy in most of the UK and in cold winters.

Can sedum survive winter outside?

Plant it out within USDA 3-9 (varies widely by species) 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 sedum below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.