Cold hardiness & minimum temperature

Is Banana Croton (Codiaeum variegatum 'Banana')cold hardy? Hardiness zone & min temp

Also called Banana croton, Garden croton 'Banana', Variegated croton 'Banana', Croton.

More about banana croton

About Banana Croton

Codiaeum variegatum 'Banana' · also called Banana croton, Garden croton 'Banana' · tropical

Banana croton is a narrow-leaved Codiaeum variegatum cultivar grown for strappy foliage splashed yellow, green and orange like a ripe banana. Its one defining need is steady warmth with bright light: colour fades and leaves drop in dim, cold or draughty spots, so a humid, warm, well-lit position is non-negotiable.

Cold limit: USDA 11-12 · RHS H1B (heated greenhouse / tropical; min 15°C) (18-29°C)

Watch for — Leaf drop: The classic croton complaint, triggered by cold draughts, temperatures below about 15°C, sudden changes in position, or compost that swings from bone-dry to soggy. Keep conditions warm, humid and steady, and expect a few leaves to drop after any move or repot.

What banana croton's hardiness rating actually means

Banana Croton 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 — 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). Banana Croton has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Banana Croton hardiness — frequently asked questions

Is banana croton cold hardy?

Banana Croton 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. Banana Croton can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature banana croton can survive?

What hardiness zone is banana croton?

Banana Croton is rated USDA 11-12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can banana croton 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 banana croton 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.