Cold hardiness & minimum temperature

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

Also called Golden mosaic ctenanthe.

More about ctenanthe pilosa 'golden mosaic'

About Ctenanthe Pilosa 'Golden Mosaic'

Ctenanthe pilosa 'Golden Mosaic' · also called Golden mosaic ctenanthe · houseplant

Ctenanthe pilosa 'Golden Mosaic' is a striking prayer plant whose elongated green leaves are dappled with bright golden-yellow mosaic flecks and brushstrokes. A clumping South American foliage perennial, it raises its leaves at night and rewards warm, humid, draught-free care with vivid mottling, but browns quickly in dry air or hard tap water.

Cold limit: USDA 11-12 (indoor in most US homes) · RHS H1b (18-27°C)

What ctenanthe pilosa 'golden mosaic''s hardiness rating actually means

Ctenanthe Pilosa 'Golden Mosaic' 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). Ctenanthe Pilosa 'Golden Mosaic' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Ctenanthe Pilosa 'Golden Mosaic' hardiness — frequently asked questions

Is ctenanthe pilosa 'golden mosaic' cold hardy?

Ctenanthe Pilosa 'Golden Mosaic' 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. Ctenanthe Pilosa 'Golden Mosaic' 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 ctenanthe pilosa 'golden mosaic' can survive?

What hardiness zone is ctenanthe pilosa 'golden mosaic'?

Ctenanthe Pilosa 'Golden Mosaic' 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 ctenanthe pilosa 'golden mosaic' 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 ctenanthe pilosa 'golden mosaic' 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.