Cold hardiness & minimum temperature

Is Alphonso Mango (Mangifera indica 'Alphonso')cold hardy? Hardiness zone & min temp

Also called Alphonso mango, Hapus mango.

More about alphonso mango

About Alphonso Mango

Mangifera indica 'Alphonso' · also called Alphonso mango, Hapus mango · tropical

'Alphonso' (Hapus) is a prized Indian mango famed for its rich, saffron-coloured, nearly fibreless flesh and intense aroma. A tropical evergreen, it needs heat, full sun and a dry spell to trigger flowering. Frost-sensitive and best grown outdoors only in frost-free climates; elsewhere it is kept as a container or greenhouse specimen.

Cold limit: USDA 10-12 (frost-free; greenhouse/container elsewhere) · RHS H1b (21-35°C)

Watch for — Cold and frost damage: Tender to cold; temperatures near or below freezing damage growth and can kill young trees. Grow under glass or move containers indoors when night temperatures fall below about 10°C.

What alphonso mango's hardiness rating actually means

Alphonso 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 10-12 (frost-free; greenhouse/container elsewhere) — 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). Alphonso Mango has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Alphonso Mango hardiness — frequently asked questions

Is alphonso mango cold hardy?

Alphonso 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. Alphonso Mango can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (frost-free; greenhouse/container elsewhere)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature alphonso mango can survive?

What hardiness zone is alphonso mango?

Alphonso Mango is rated USDA 10-12 (frost-free; greenhouse/container elsewhere) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can alphonso 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 alphonso 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.