Cold hardiness & minimum temperature

Is Anthurium clarinervium (Velvet Cardboard Anthurium) (Anthurium clarinervium)cold hardy? Hardiness zone & min temp

Also called Velvet cardboard anthurium, Velvet anthurium, Esqueleto anthurium.

More about anthurium clarinervium (velvet cardboard anthurium)

About Anthurium clarinervium (Velvet Cardboard Anthurium)

Anthurium clarinervium · also called Velvet cardboard anthurium, Velvet anthurium · tropical

A collector's aroid grown for its heart-shaped, velvety dark-green leaves laced with bright ivory veins. Native to limestone outcrops in Chiapas, Mexico, it is a slow-growing epiphyte. Its one defining need is consistently high humidity paired with a chunky, fast-draining mix, since soggy roots and dry air both punish it quickly.

Cold limit: 18-27°C

Watch for — Stalled growth and small new leaves: Naturally slow, but very dim light or a chronically cold spot makes it almost stop. Move it to brighter indirect light and keep it reliably above about 18°C to push fuller new foliage.

What anthurium clarinervium (velvet cardboard anthurium)'s hardiness rating actually means

Anthurium clarinervium (Velvet Cardboard 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 formally rated (treat as tender) — 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 clarinervium (Velvet Cardboard Anthurium) has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Anthurium clarinervium (Velvet Cardboard Anthurium) hardiness — frequently asked questions

Is anthurium clarinervium (velvet cardboard anthurium) cold hardy?

Anthurium clarinervium (Velvet Cardboard 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. Anthurium clarinervium (Velvet Cardboard Anthurium) can only live outside year-round in genuinely frost-free climates (roughly USDA not formally rated (treat as tender)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature anthurium clarinervium (velvet cardboard anthurium) can survive?

What hardiness zone is anthurium clarinervium (velvet cardboard anthurium)?

Anthurium clarinervium (Velvet Cardboard Anthurium) is rated USDA not formally rated (treat as tender) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can anthurium clarinervium (velvet cardboard 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 anthurium clarinervium (velvet cardboard 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.