Cold hardiness & minimum temperature

Is Strap-Leaf Anthurium (Anthurium wendlingeri)cold hardy? Hardiness zone & min temp

Also called Strap-leaf anthurium, Wendling's anthurium, Pendant anthurium.

More about strap-leaf anthurium

About Strap-Leaf Anthurium

Anthurium wendlingeri · also called Strap-leaf anthurium, Wendling's anthurium · houseplant

The strap-leaf anthurium (Anthurium wendlingeri) is a pendant epiphytic aroid from Central American cloud forests, prized for long, corrugated, cascading strap leaves. It needs bright indirect light, a chunky airy mix kept evenly moist, and high humidity above 60 percent. Like all anthuriums it is toxic to cats and dogs.

Cold limit: USDA 11-12 (tender; grow as a houseplant or under glass, no frost tolerance) (18-27°C)

What strap-leaf anthurium's hardiness rating actually means

Strap-Leaf Anthurium 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 (tender; grow as a houseplant or under glass, no frost tolerance) — 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). Strap-Leaf Anthurium has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Strap-Leaf Anthurium hardiness — frequently asked questions

Is strap-leaf anthurium cold hardy?

Strap-Leaf Anthurium 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. Strap-Leaf Anthurium can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (tender; grow as a houseplant or under glass, no frost tolerance)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature strap-leaf anthurium can survive?

What hardiness zone is strap-leaf anthurium?

Strap-Leaf Anthurium is rated USDA 11-12 (tender; grow as a houseplant or under glass, no frost tolerance) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can strap-leaf anthurium 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 strap-leaf anthurium 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.