Cold hardiness & minimum temperature

Is Pink Mandevilla (Mandevilla × amabilis)cold hardy? Hardiness zone & min temp

Also called Pink Mandevilla, Lovely Mandevilla, Alice du Pont Mandevilla.

More about pink mandevilla

About Pink Mandevilla

Mandevilla × amabilis · also called Pink Mandevilla, Lovely Mandevilla · tropical

Pink Mandevilla is a popular hybrid climbing vine valued for its large, trumpet-shaped pink flowers with deeper pink centres produced abundantly from late spring through autumn. A classic patio and conservatory plant in temperate zones, it grows rapidly with support and is well-suited to containers on sunny terraces. Requires warmth, bright light, and well-drained soil.

Cold limit: USDA 9-11 · RHS H1b (15-35°C)

Watch for — Bud drop: Dropping flower buds before opening is commonly caused by sudden changes in environment (moving the plant), temperature fluctuation, underwatering, or low light. Once in bud, keep the plant stable, consistently watered, and in its preferred bright position.

What pink mandevilla's hardiness rating actually means

Pink Mandevilla 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 9-11 — 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). Pink Mandevilla has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Pink Mandevilla hardiness — frequently asked questions

Is pink mandevilla cold hardy?

Pink Mandevilla 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. Pink Mandevilla can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature pink mandevilla can survive?

What hardiness zone is pink mandevilla?

Pink Mandevilla is rated USDA 9-11 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can pink mandevilla 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 pink mandevilla 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.