Cold hardiness & minimum temperature

Is Nam Doc Mai Mango (Mangifera indica 'Nam Doc Mai')cold hardy? Hardiness zone & min temp

Also called Nam Doc Mai mango, Thai mango.

More about nam doc mai mango

About Nam Doc Mai Mango

Mangifera indica 'Nam Doc Mai' · also called Nam Doc Mai mango, Thai mango · tropical

Nam Doc Mai is a prized Thai mango cultivar grown for its sweet, fibreless, elongated yellow fruit and its tendency to fruit while young and in containers. It demands full sun, warmth and free-draining soil, and is reliably productive only in frost-free climates or under glass in cooler regions.

Cold limit: USDA 10-11 (container/greenhouse in cooler US zones; tender below ~4°C) · RHS H1b (21-30°C)

Watch for — Failure to flower or fruit: Caused by too little light, excess nitrogen, or lack of a cool, dry rest. Maximise sun, ease off feeding, and allow a drier winter period to trigger flowering.

What nam doc mai mango's hardiness rating actually means

Nam Doc Mai Mango 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 10-11 (container/greenhouse in cooler US zones; tender below ~4°C) — 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). Nam Doc Mai Mango has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Nam Doc Mai Mango hardiness — frequently asked questions

Is nam doc mai mango cold hardy?

Nam Doc Mai Mango 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. Nam Doc Mai Mango can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (container/greenhouse in cooler US zones; tender below ~4°C)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature nam doc mai mango can survive?

What hardiness zone is nam doc mai mango?

Nam Doc Mai Mango is rated USDA 10-11 (container/greenhouse in cooler US zones; tender below ~4°C) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can nam doc mai mango 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 nam doc mai mango 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.