Cold hardiness & minimum temperature

Is Cryptocoryne albida (Cryptocoryne albida)cold hardy? Hardiness zone & min temp

Also called albida Crypt, narrow pink Crypt.

More about cryptocoryne albida

About Cryptocoryne albida

Cryptocoryne albida · also called albida Crypt, narrow pink Crypt · tropical

Cryptocoryne albida is a small, slow-growing rosette Crypt from mainland Southeast Asia with narrow, often patterned or reddish-brown leaves. Hardy and low-maintenance once established, it suits low-tech tanks and tolerates low light without CO2. Like most Crypts it can shed leaves ('Crypt melt') after replanting but usually recovers from its rhizome.

Cold limit: USDA Tropical aquarium plant; not frost-hardy, kept in heated aquaria (22-28°C)

What cryptocoryne albida's hardiness rating actually means

Cryptocoryne albida 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 Tropical aquarium plant; not frost-hardy, kept in heated aquaria — 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). Cryptocoryne albida has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Cryptocoryne albida hardiness — frequently asked questions

Is cryptocoryne albida cold hardy?

Cryptocoryne albida 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. Cryptocoryne albida can only live outside year-round in genuinely frost-free climates (roughly USDA Tropical aquarium plant; not frost-hardy, kept in heated aquaria); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature cryptocoryne albida can survive?

What hardiness zone is cryptocoryne albida?

Cryptocoryne albida is rated USDA Tropical aquarium plant; not frost-hardy, kept in heated aquaria and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can cryptocoryne albida 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 cryptocoryne albida 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.