Cold hardiness & minimum temperature

Is Brazilian Jasmine (Mandevilla sanderi)cold hardy? Hardiness zone & min temp

Also called Brazilian Jasmine, Dipladenia.

More about brazilian jasmine

About Brazilian Jasmine

Mandevilla sanderi · also called Brazilian Jasmine, Dipladenia · flowering

Brazilian jasmine, often sold as dipladenia, is a tender tropical plant with a bushier, more trailing habit than climbing mandevillas. It bears glossy leaves and showy trumpet flowers in pink, red or white throughout summer, ideal for pots, baskets and patios. Heat- and drought-tolerant once established, it must be overwintered frost-free in cool climates.

Cold limit: USDA 10-11 (tender; container/annual elsewhere) · RHS H1c (18-29°C)

Watch for — Cold sensitivity: Frost-tender and damaged below about 10°C. Move it indoors before autumn cold and overwinter frost-free; in spring cut back and resume feeding as growth restarts.

What brazilian jasmine's hardiness rating actually means

Brazilian Jasmine 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 10-11 (tender; container/annual 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 5 °C (and never frost). Brazilian Jasmine has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for brazilian jasmine 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 brazilian jasmine 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 brazilian jasmine can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Brazilian Jasmine hardiness — frequently asked questions

Is brazilian jasmine cold hardy?

Brazilian Jasmine 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. Brazilian Jasmine can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (tender; container/annual elsewhere)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature brazilian jasmine can survive?

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

What hardiness zone is brazilian jasmine?

Brazilian Jasmine is rated USDA 10-11 (tender; container/annual elsewhere) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can brazilian jasmine 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 brazilian jasmine 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.