Cold hardiness & minimum temperature

Is Za Baobab (Adansonia za)cold hardy? Hardiness zone & min temp

Also called Za Baobab, Madagascar Baobab.

More about za baobab

About Za Baobab

Adansonia za · also called Za Baobab, Madagascar Baobab · tropical

The most widespread of Madagascar's native baobabs, found across the island's west and south in diverse dry forests. More variable in trunk shape than A. grandidieri — from bottle-shaped to cylindrical. Adapts reasonably well to container culture; needs full sun, excellent drainage, and a pronounced dry winter rest like all baobabs.

Cold limit: USDA 10–11 · RHS H1b (15–38°C)

Watch for — Root and trunk rot: Over-watering in winter dormancy is the leading cause of death. The enlarged water-storing trunk is prone to fungal rots once excess moisture is present. Use gritty compost and reduce watering severely from leaf-fall through to bud-break.

What za baobab's hardiness rating actually means

Za Baobab 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 — 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). Za Baobab has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Za Baobab hardiness — frequently asked questions

Is za baobab cold hardy?

Za Baobab 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. Za Baobab can only live outside year-round in genuinely frost-free climates (roughly USDA 10–11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature za baobab can survive?

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

What hardiness zone is za baobab?

Za Baobab is rated USDA 10–11 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can za baobab 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 za baobab 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.