Cold hardiness & minimum temperature

Is Mapu Fan Palm (Licuala mattanensis 'Mapu')cold hardy? Hardiness zone & min temp

Also called Mapu Fan Palm, Licuala Mapu.

More about mapu fan palm

About Mapu Fan Palm

Licuala mattanensis 'Mapu' · also called Mapu Fan Palm, Licuala Mapu · houseplant

Licuala mattanensis 'Mapu' is a compact, highly ornamental fan palm cultivar from Borneo, prized for its nearly circular, deeply pleated leaves with distinctive dark green colouration and clean segmentation. One of the most popular Licuala cultivars among indoor palm collectors, it demands high humidity and warmth but rewards with exceptional tropical foliage on a manageable, slow-growing plant.

Cold limit: USDA 11-12 · RHS H1a (18–30°C)

Watch for — Leaf tip and edge browning: By far the most common complaint. Causes include low humidity (below 60% RH), fluoride toxicity from tap water, cold draughts from air conditioning, and underwatering. Switch to rainwater or filtered water, raise humidity actively with a humidifier, and keep the plant well away from heating and cooling vents.

What mapu fan palm's hardiness rating actually means

Mapu Fan Palm 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 H1a means: Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever. 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 above about 15 °C (warm, never cold). Mapu Fan Palm has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for mapu fan palm as it gets too cold:

Below about above about 15 °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 mapu fan palm go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above above 15 °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 mapu fan palm can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

Mapu Fan Palm hardiness — frequently asked questions

Is mapu fan palm cold hardy?

Mapu Fan Palm 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. Mapu Fan Palm 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 mapu fan palm can survive?

Minimum survivable temperature is roughly above about 15 °C (warm, never cold). Mapu Fan Palm has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is mapu fan palm?

Mapu Fan Palm is rated USDA 11-12 and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can mapu fan palm survive winter outside?

It can holiday outdoors in summer once nights are reliably above above 15 °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 mapu fan palm below its minimum temperature?

Below about above about 15 °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.