Cold hardiness & minimum temperature

Is Acerola (Malpighia emarginata)cold hardy? Hardiness zone & min temp

Also called Acerola, Barbados cherry, West Indian cherry.

More about acerola

About Acerola

Malpighia emarginata · also called Acerola, Barbados cherry · tropical

Acerola is a small evergreen tropical shrub or tree prized for vitamin-C-rich cherry-like fruit. It thrives in full sun, warm humid conditions and well-drained soil, fruiting heavily in frost-free climates. In cooler regions grow it in a large container that can be moved under cover. It is fast-growing, self-fertile in many cultivars and tolerates light pruning.

Cold limit: USDA 9b-11 (container/indoor elsewhere) · RHS H1c (20-32°C)

Watch for — Cold damage: Leaf and twig dieback below about 5°C; protect or move containers indoors before frost.

What acerola's hardiness rating actually means

Acerola 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 9b-11 (container/indoor elsewhere) — 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). Acerola has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Acerola hardiness — frequently asked questions

Is acerola cold hardy?

Acerola 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. Acerola can only live outside year-round in genuinely frost-free climates (roughly USDA 9b-11 (container/indoor elsewhere)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature acerola can survive?

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

What hardiness zone is acerola?

Acerola is rated USDA 9b-11 (container/indoor elsewhere) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can acerola 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 acerola 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.