Cold hardiness & minimum temperature

Is Peperomia caperata 'Luna Red' (Peperomia caperata 'Luna Red')cold hardy? Hardiness zone & min temp

Also called luna red peperomia, red ripple peperomia.

More about peperomia caperata 'luna red'

About Peperomia caperata 'Luna Red'

Peperomia caperata 'Luna Red' · also called luna red peperomia, red ripple peperomia · houseplant

Peperomia caperata 'Luna Red' is a compact rosette-forming cultivar with deeply corrugated, heart-shaped leaves in rich burgundy-wine to near-black tones. Slender rat-tail flower spikes rise above the foliage. A semi-succulent that holds water in its leaves and stems, it stays small, dislikes wet feet and is non-toxic to pets, making it an attractive, easy desk or windowsill plant.

Cold limit: USDA 11-12 (indoor in most US homes) · RHS H1b (18-26°C)

What peperomia caperata 'luna red''s hardiness rating actually means

Peperomia caperata 'Luna Red' 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 H1b means: Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season. On the US scale that maps to USDA 11-12 (indoor in most US homes) — 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 10 °C (sustained cold below this is damaging). Peperomia caperata 'Luna Red' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for peperomia caperata 'luna red' as it gets too cold:

Below about about 10 °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 peperomia caperata 'luna red' go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 10 °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 peperomia caperata 'luna red' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Peperomia caperata 'Luna Red' hardiness — frequently asked questions

Is peperomia caperata 'luna red' cold hardy?

Peperomia caperata 'Luna Red' 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. Peperomia caperata 'Luna Red' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature peperomia caperata 'luna red' can survive?

What hardiness zone is peperomia caperata 'luna red'?

Peperomia caperata 'Luna Red' is rated USDA 11-12 (indoor in most US homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can peperomia caperata 'luna red' survive winter outside?

It can holiday outdoors in summer once nights are reliably above 10 °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 peperomia caperata 'luna red' below its minimum temperature?

Below about about 10 °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.