Cold hardiness & minimum temperature

Is Bracted Lipstick Plant (Aeschynanthus bracteatus)cold hardy? Hardiness zone & min temp

Also called Bracted Lipstick Plant, Bracteate Basket Vine.

More about bracted lipstick plant

About Bracted Lipstick Plant

Aeschynanthus bracteatus · also called Bracted Lipstick Plant, Bracteate Basket Vine · tropical

A trailing epiphytic gesneriad from tropical Southeast Asian forests, distinguished by its prominent green bracts that frame the emerging tubular scarlet-orange flowers — giving the 'lipstick emerging from a tube' appearance that inspired the common name. It requires bright indirect light, high humidity, and a well-drained epiphytic mix to thrive and bloom reliably.

Cold limit: USDA 11-12 · RHS H1a (16 to 28°C)

Watch for — Bud drop: Sudden changes in temperature, low humidity, or inconsistent watering cause buds to drop before opening. Keep conditions stable — avoid moving the plant once buds have formed and maintain humidity above 60%.

What bracted lipstick plant's hardiness rating actually means

Bracted Lipstick Plant 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 11-12 — 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). Bracted Lipstick Plant has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for bracted lipstick plant 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 bracted lipstick plant 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 bracted lipstick plant can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

Bracted Lipstick Plant hardiness — frequently asked questions

Is bracted lipstick plant cold hardy?

Bracted Lipstick Plant 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. Bracted Lipstick Plant can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature bracted lipstick plant can survive?

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

What hardiness zone is bracted lipstick plant?

Bracted Lipstick Plant is rated USDA 11-12 and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can bracted lipstick plant 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 bracted lipstick plant 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.