Cold hardiness & minimum temperature

Is Golden Mosaic Ctenanthe (Ctenanthe lubbersiana 'Golden Mosaic')cold hardy? Hardiness zone & min temp

Also called Bamburanta, Golden Mosaic plant, Never-Never plant, Brazilian golden mosaic, Ctenanthe.

More about golden mosaic ctenanthe

About Golden Mosaic Ctenanthe

Ctenanthe lubbersiana 'Golden Mosaic' · also called Bamburanta, Golden Mosaic plant · houseplant

The Golden Mosaic Ctenanthe (Ctenanthe lubbersiana 'Bamburanta') is a bushy Brazilian prayer plant grown for deep-green leaves splashed with cream-yellow marbling on bamboo-like stems. It wants bright indirect light, evenly moist soil, warmth above 60F, and high humidity. Not individually ASPCA-listed, so treat as a verify-with-vet plant rather than confirmed pet-safe.

Cold limit: USDA USDA 11-12 (RHS H1b); not frost hardy. Grown as a houseplant in temperate climates and outdoors only in frost-free tropical regions; keep above about 15-16C (60F) indoors. (16-29C, with a minimum around 15-16C)

Watch for — Yellowing leaves: Usually overwatering or soggy, poorly drained soil; can also follow cold draughts below 60F. Let the top inch dry between waterings and make sure the pot drains freely.

What golden mosaic ctenanthe's hardiness rating actually means

Golden Mosaic Ctenanthe 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 USDA 11-12 (RHS H1b); not frost hardy. Grown as a houseplant in temperate climates and outdoors only in frost-free tropical regions; keep above about 15-16C (60F) indoors. — 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). Golden Mosaic Ctenanthe has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Golden Mosaic Ctenanthe hardiness — frequently asked questions

Is golden mosaic ctenanthe cold hardy?

Golden Mosaic Ctenanthe 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. Golden Mosaic Ctenanthe can only live outside year-round in genuinely frost-free climates (roughly USDA USDA 11-12 (RHS H1b); not frost hardy. Grown as a houseplant in temperate climates and outdoors only in frost-free tropical regions; keep above about 15-16C (60F) indoors.); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature golden mosaic ctenanthe can survive?

What hardiness zone is golden mosaic ctenanthe?

Golden Mosaic Ctenanthe is rated USDA USDA 11-12 (RHS H1b); not frost hardy. Grown as a houseplant in temperate climates and outdoors only in frost-free tropical regions; keep above about 15-16C (60F) indoors. and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can golden mosaic ctenanthe 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 golden mosaic ctenanthe 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.