Cold hardiness & minimum temperature

Is Anthurium pentaphyllum (Anthurium pentaphyllum)cold hardy? Hardiness zone & min temp

Also called five-leaf anthurium, pedate anthurium.

More about anthurium pentaphyllum

About Anthurium pentaphyllum

Anthurium pentaphyllum · also called five-leaf anthurium, pedate anthurium · tropical

Anthurium pentaphyllum is a vining aroid from Mexico to tropical South America with distinctive pedate (finger-like) palmate leaves divided into several radiating leaflets. An epiphyte or lithophyte in nature, it climbs by aerial roots and can build into an upright clump. Give it bright indirect light, warmth, high humidity and a chunky, well-aerated mix.

Cold limit: USDA 10-12 (indoor/greenhouse in most US climates) · RHS H1b (18-27°C)

Watch for — Crisping leaflet edges: Low humidity is the usual cause. Increase humidity and avoid placing near heat sources or draughts.

What anthurium pentaphyllum's hardiness rating actually means

Anthurium pentaphyllum 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 10-12 (indoor/greenhouse in most US climates) — 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). Anthurium pentaphyllum has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Anthurium pentaphyllum hardiness — frequently asked questions

Is anthurium pentaphyllum cold hardy?

Anthurium pentaphyllum 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. Anthurium pentaphyllum can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor/greenhouse in most US climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature anthurium pentaphyllum can survive?

What hardiness zone is anthurium pentaphyllum?

Anthurium pentaphyllum is rated USDA 10-12 (indoor/greenhouse in most US climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can anthurium pentaphyllum 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 anthurium pentaphyllum 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.