Cold hardiness & minimum temperature

Is Caryota No (Caryota no)cold hardy? Hardiness zone & min temp

Also called solitary fishtail palm, no fishtail palm.

More about caryota no

About Caryota No

Caryota no · also called solitary fishtail palm, no fishtail palm · tropical

Caryota no is a large, solitary fishtail palm from Borneo with a single stout trunk and huge bipinnate fronds bearing the genus's signature ragged, fish-fin leaflets. A fast-growing, monocarpic tropical for warm gardens and big conservatories, it wants bright light, abundant water, rich soil, and steady warmth. Like all Caryota, it carries irritating calcium oxalate crystals and is toxic to pets.

Cold limit: USDA 10b-11 (tender; damaged by frost) · RHS H1b (18-32°C)

Watch for — Cold sensitivity: As a lowland tropical species it is frost-tender and suffers below about 10°C, showing blackened fronds. Keep it warm and protect from cold draughts.

What caryota no's hardiness rating actually means

Caryota No 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 10b-11 (tender; damaged by frost) — 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). Caryota No has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for caryota no 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 caryota no 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 caryota no can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Caryota No hardiness — frequently asked questions

Is caryota no cold hardy?

Caryota No 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. Caryota No can only live outside year-round in genuinely frost-free climates (roughly USDA 10b-11 (tender; damaged by frost)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature caryota no can survive?

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Caryota No has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is caryota no?

Caryota No is rated USDA 10b-11 (tender; damaged by frost) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can caryota no 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 caryota no 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.