Cold hardiness & minimum temperature

Is Carla Black's Anthurium (Anthurium carlablackiae)cold hardy? Hardiness zone & min temp

Also called Carla Black's Anthurium, Carla Black anthurium, velvet-leaf anthurium.

More about carla black's anthurium

About Carla Black's Anthurium

Anthurium carlablackiae · also called Carla Black's Anthurium, Carla Black anthurium · houseplant

Carla Black's Anthurium is a rare velvet-leaf aroid from Panama and Colombia, prized for near-black, pale-veined foliage on a compact terrestrial rosette. It wants bright indirect light, high humidity, warmth, and a chunky, fast-draining aroid mix. Like all anthuriums it is ASPCA-toxic to cats and dogs, so keep it out of pets' reach.

Cold limit: USDA Not winter-hardy; grow as an indoor or greenhouse houseplant. Suited to outdoor growing only in frost-free tropical conditions (roughly USDA zones 11-12). (18-27 C)

Watch for — Crispy brown leaf edges and tips: Typically low humidity, dry air from vents, or inconsistent watering. Raise humidity toward 70-80% with a humidifier, cabinet or terrarium, and keep the plant away from heat sources and drafts.

What carla black's anthurium's hardiness rating actually means

Carla Black'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 Not winter-hardy; grow as an indoor or greenhouse houseplant. Suited to outdoor growing only in frost-free tropical conditions (roughly USDA zones 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 about 10 °C (sustained cold below this is damaging). Carla Black's Anthurium has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for carla black'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 carla black'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 carla black'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.

Carla Black's Anthurium hardiness — frequently asked questions

Is carla black's anthurium cold hardy?

Carla Black'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. Carla Black's Anthurium can only live outside year-round in genuinely frost-free climates (roughly USDA Not winter-hardy; grow as an indoor or greenhouse houseplant. Suited to outdoor growing only in frost-free tropical conditions (roughly USDA zones 11-12).); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature carla black's anthurium can survive?

What hardiness zone is carla black's anthurium?

Carla Black's Anthurium is rated USDA Not winter-hardy; grow as an indoor or greenhouse houseplant. Suited to outdoor growing only in frost-free tropical conditions (roughly USDA zones 11-12). and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can carla black'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 carla black'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.