Cold hardiness & minimum temperature

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

Also called Coppertone stonecrop, Coppertone sedum, Coppertone succulent.

More about coppertone stonecrop

About Coppertone Stonecrop

Sedum nussbaumerianum · also called Coppertone stonecrop, Coppertone sedum · houseplant

Coppertone stonecrop (Sedum nussbaumerianum) is an easy-care succulent prized for tapered rosettes that flush copper-orange in strong light. Give it bright, direct sun, gritty fast-draining soil and the soak-and-dry watering method. It is pet-safe: not individually ASPCA-listed, but the Sedum genus is non-toxic. Confirm with your vet.

Cold limit: USDA USDA zones 10-11 (hardy to about 30 F / -1 C); not frost-tolerant, grow as a houseplant or overwinter indoors in colder zones. (18-27 C)

Watch for — Frost damage: Not cold-hardy below about 30 F (-1 C); frost turns tissue translucent and mushy. Bring indoors before cold snaps in zones below 10.

What coppertone stonecrop's hardiness rating actually means

Coppertone Stonecrop is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Its RHS rating of H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA USDA zones 10-11 (hardy to about 30 F / -1 C); not frost-tolerant, grow as a houseplant or overwinter indoors in colder zones. — 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 5 °C (and never frost). Coppertone Stonecrop has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for coppertone stonecrop as it gets too cold:

Below about about 5 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches.
A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover.
Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.

Can coppertone stonecrop go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °C, in shade or dappled light, hardened off gradually.
Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C.
It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

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 coppertone stonecrop can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Coppertone Stonecrop hardiness — frequently asked questions

Is coppertone stonecrop cold hardy?

Coppertone Stonecrop is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Indoor-only in almost every home. Coppertone Stonecrop can only live outside year-round in genuinely frost-free climates (roughly USDA USDA zones 10-11 (hardy to about 30 F / -1 C); not frost-tolerant, grow as a houseplant or overwinter indoors in colder zones.); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature coppertone stonecrop can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). Coppertone Stonecrop has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is coppertone stonecrop?

Coppertone Stonecrop is rated USDA USDA zones 10-11 (hardy to about 30 F / -1 C); not frost-tolerant, grow as a houseplant or overwinter indoors in colder zones. and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can coppertone stonecrop survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °C, in shade or dappled light, hardened off gradually. Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C. It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

What happens to coppertone stonecrop below its minimum temperature?

Below about about 5 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches. A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover. Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.