Cold hardiness & minimum temperature

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

Also called Queen Anthurium, Queen Anthurium velvet-leaf, Anthurium warocqueanum.

More about queen anthurium

About Queen Anthurium

Anthurium warocqueanum · also called Queen Anthurium, Queen Anthurium velvet-leaf · tropical

Queen Anthurium (Anthurium warocqueanum) is a prized velvet-leaf aroid from Colombian cloud forests, growing pendant leaves up to a metre long. It demands bright indirect light, warmth, and high humidity (60-80%) in an airy aroid mix. The ASPCA classes Anthurium as toxic to cats and dogs, so keep it out of pets' reach.

Cold limit: USDA 11-12 (frost-tender; grown as an indoor/greenhouse plant in temperate climates) (20-30 C)

Watch for — Stalled or stunted new growth: Often from cold drafts, temperatures below 15 C (60 F), or chronically low humidity. Keep it warm (20-30 C), away from drafts, and humid for steady leaf production.

What queen anthurium's hardiness rating actually means

Queen 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 (frost-tender; grown as an indoor/greenhouse plant in temperate 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). Queen Anthurium has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Queen Anthurium hardiness — frequently asked questions

Is queen anthurium cold hardy?

Queen 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. Queen Anthurium can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (frost-tender; grown as an indoor/greenhouse plant in temperate climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature queen anthurium can survive?

What hardiness zone is queen anthurium?

Queen Anthurium is rated USDA 11-12 (frost-tender; grown as an indoor/greenhouse plant in temperate climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can queen 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 queen 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.