Cold hardiness & minimum temperature

Is White Frangipani (Plumeria alba)cold hardy? Hardiness zone & min temp

Also called White Frangipani, Nosegay, West Indian Jasmine.

More about white frangipani

About White Frangipani

Plumeria alba · also called White Frangipani, Nosegay · tropical

Plumeria alba is the classic white frangipani of the Caribbean and West Indies, producing intensely fragrant pure-white flowers with a yellow throat in summer and autumn. A deciduous, fast-growing small tree, it thrives in full sun with excellent drainage and is widely used in lei-making and temple offerings across the tropics.

Cold limit: USDA 10b–12 · RHS H1a (13–38 °C)

Watch for — Black-tip rot: Stem tips turn black and mushy, spreading downward — caused by Plenodomus (Phoma) plumeriae or cold/moisture stress. Cut back to clean tissue with a sterile blade, dust with sulphur, and callous. Prevent by keeping plants dry and warm during dormancy.

What white frangipani's hardiness rating actually means

White Frangipani 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 H1a means: Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever. On the US scale that maps to USDA 10b–12 — 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 above about 15 °C (warm, never cold). White Frangipani has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for white frangipani as it gets too cold:

Below about above about 15 °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 frangipani go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above above 15 °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 frangipani can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

White Frangipani hardiness — frequently asked questions

Is white frangipani cold hardy?

White Frangipani 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 Frangipani can only live outside year-round in genuinely frost-free climates (roughly USDA 10b–12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature white frangipani can survive?

Minimum survivable temperature is roughly above about 15 °C (warm, never cold). White Frangipani has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is white frangipani?

White Frangipani is rated USDA 10b–12 and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can white frangipani survive winter outside?

It can holiday outdoors in summer once nights are reliably above above 15 °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 frangipani below its minimum temperature?

Below about above about 15 °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.