Cold hardiness & minimum temperature

Is Snake plant (Dracaena trifasciata)cold hardy? Hardiness zone & min temp

Also called mother-in-law's tongue, Saint George’s sword, Sansevieria trifasciata.

About Snake plant

Dracaena trifasciata · also called mother-in-law's tongue, Saint George’s sword · houseplant

Snake plant is a near-indestructible African succulent that stores water in upright sword-shaped leaves. It thrives on neglect, tolerates low light, and is one of the easiest houseplants to kill by overwatering. Mildly toxic to pets, so keep out of cat-chewing reach.

The snake plant (Dracaena trifasciata, formerly Sansevieria) is native to rocky, dry areas of West and West-Central Africa, including Nigeria, Cameroon, Gabon and the Congo, an arid habitat that explains its extreme drought tolerance.

Slow-growing and tender (USDA zones 10-12); wild plants can reach about 2 m tall, but houseplant specimens usually stay under 1 m. It is toxic to cats and dogs (saponins) per ASPCA, causing drooling, vomiting and oral irritation.

Cold limit: USDA 10-12 (indoor-only in most US homes) · RHS H1b (15-27°C)

Sources: kew.org, missouribotanicalgarden.org, aspca.org

What snake plant's hardiness rating actually means

Snake plant 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 10-12 (indoor-only in most US homes) — 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). Snake plant has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Snake plant hardiness — frequently asked questions

Is snake plant cold hardy?

Snake plant 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. Snake plant can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor-only in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature snake plant can survive?

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Snake plant has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is snake plant?

Snake plant is rated USDA 10-12 (indoor-only in most US homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can snake plant 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 snake plant 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.