Cold hardiness & minimum temperature

Is Tamarind (Tamarindus indica)cold hardy? Hardiness zone & min temp

Also called Tamarind, Indian date, Tamarindo.

More about tamarind

About Tamarind

Tamarindus indica · also called Tamarind, Indian date · tropical

Tamarind is a long-lived tropical legume tree grown for its tangy, pulpy seed pods. Far tougher than most tropical fruit trees, it tolerates heat, drought and poor soil once established, needing full sun and free-draining ground. It is frost-tender but adaptable, and makes a handsome, fine-foliaged specimen or large bonsai.

Cold limit: USDA 10-12 (mature trees tolerate brief light frost; container/conservatory in UK and cooler US) · RHS H1b (20-35°C)

Watch for — Frost damage to young trees: Juveniles are killed by frost and even mature trees suffer below about 0 to -2°C; protect or grow under cover in temperate climates.

What tamarind's hardiness rating actually means

Tamarind 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 (mature trees tolerate brief light frost; container/conservatory in UK and cooler US) — 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). Tamarind has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Tamarind hardiness — frequently asked questions

Is tamarind cold hardy?

Tamarind 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. Tamarind can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (mature trees tolerate brief light frost; container/conservatory in UK and cooler US)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature tamarind can survive?

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

What hardiness zone is tamarind?

Tamarind is rated USDA 10-12 (mature trees tolerate brief light frost; container/conservatory in UK and cooler US) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can tamarind 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 tamarind 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.