Cold hardiness & minimum temperature

Is Red Groove Peperomia (Peperomia ravula)cold hardy? Hardiness zone & min temp

Also called Red Groove Peperomia.

More about red groove peperomia

About Red Groove Peperomia

Peperomia ravula · also called Red Groove Peperomia · houseplant

Peperomia ravula is a lesser-known tropical species from the rainforests of South America, characterised by its small, rounded to elliptic leaves and reddish stem grooves that give the plant its descriptive common name. Like most compact Peperomia species, it prefers the warm, humid conditions of its forest-floor native habitat and makes an excellent small-pot or terrarium houseplant. The most important care principle is avoiding waterlogged soil, as the roots have low tolerance for sustained moisture. The ASPCA considers the Peperomia genus non-toxic to cats and dogs.

Cold limit: USDA 10–12 (indoor in most climates) · RHS H1b (18–26°C)

What red groove peperomia's hardiness rating actually means

Red Groove Peperomia 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 10–12 (indoor in most climates) — 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). Red Groove Peperomia has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for red groove peperomia 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 red groove peperomia 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 red groove peperomia can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Red Groove Peperomia hardiness — frequently asked questions

Is red groove peperomia cold hardy?

Red Groove Peperomia 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. Red Groove Peperomia can only live outside year-round in genuinely frost-free climates (roughly USDA 10–12 (indoor in most climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature red groove peperomia can survive?

What hardiness zone is red groove peperomia?

Red Groove Peperomia is rated USDA 10–12 (indoor in most climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can red groove peperomia 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 red groove peperomia 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.