Cold hardiness & minimum temperature

Is White bird of paradise (Strelitzia nicolai)cold hardy? Hardiness zone & min temp

Also called giant bird of paradise, wild banana.

About White bird of paradise

Strelitzia nicolai · also called giant bird of paradise, wild banana · tropical

White bird of paradise is a large tropical from South Africa with paddle leaves on tall trunks. Indoors it grows into a striking 2-3 m specimen. White-and-blue flowers are rare indoors. Mildly toxic to pets; the showy orange-flowering Strelitzia reginae is the same risk.

Strelitzia nicolai, the giant white bird of paradise, native to subtropical coastal forest and riverbanks of eastern South Africa where it forms tall clumping multi-stemmed crowns.

Huge banana-like paddle leaves that naturally split along the veins with age and wind exposure; reaches several metres indoors and the white-and-blue 'bird' bracts appear only on mature plants in strong light.

Cold limit: USDA 10-12 (indoor in most US homes) · RHS H1c (18-27°C)

Sources: missouribotanicalgarden.org, happyhouseplants.co.uk

What white bird of paradise's hardiness rating actually means

White bird of paradise 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 10-12 (indoor 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 5 °C (and never frost). White bird of paradise has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for white bird of paradise as it gets too cold:

Below about about 5 °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 white bird of paradise go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °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 white bird of paradise can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

White bird of paradise hardiness — frequently asked questions

Is white bird of paradise cold hardy?

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

What is the minimum temperature white bird of paradise can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). White bird of paradise has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is white bird of paradise?

White bird of paradise is rated USDA 10-12 (indoor in most US homes) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can white bird of paradise survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °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 white bird of paradise below its minimum temperature?

Below about about 5 °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.