Cold hardiness & minimum temperature

Is Dressler's Anthurium (Anthurium dressleri)cold hardy? Hardiness zone & min temp

Also called Dressler's Anthurium, Dressleri Anthurium, Velvet Anthurium.

More about dressler's anthurium

About Dressler's Anthurium

Anthurium dressleri · also called Dressler's Anthurium, Dressleri Anthurium · houseplant

Dressler's Anthurium is a rare velvet-leaved aroid from Panama's tropical understory, prized for near-black, heart-shaped foliage. It needs warm, very humid, brightly shaded conditions and an airy, moisture-retentive mix, and resents overwatering. Like all Anthurium, it is ASPCA-listed toxic to cats and dogs because of insoluble calcium oxalate crystals.

Cold limit: USDA 10b-12 (grow indoors or in a terrarium in cooler climates) (20-27 C)

Watch for — Stalled or stunted growth: Often too cold, too dry, or fertiliser-salt buildup. Keep it warm (20-27 C), humid, and flush the mix periodically.

What dressler's anthurium's hardiness rating actually means

Dressler's 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 10b-12 (grow indoors or in a terrarium in cooler 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). Dressler's Anthurium has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Dressler's Anthurium hardiness — frequently asked questions

Is dressler's anthurium cold hardy?

Dressler's 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. Dressler's Anthurium can only live outside year-round in genuinely frost-free climates (roughly USDA 10b-12 (grow indoors or in a terrarium in cooler climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature dressler's anthurium can survive?

What hardiness zone is dressler's anthurium?

Dressler's Anthurium is rated USDA 10b-12 (grow indoors or in a terrarium in cooler climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can dressler's 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 dressler's 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.