Cold hardiness & minimum temperature

Is Aeschynanthus 'Black Pagoda' (Aeschynanthus 'Black Pagoda')cold hardy? Hardiness zone & min temp

Also called black pagoda lipstick plant.

More about aeschynanthus 'black pagoda'

About Aeschynanthus 'Black Pagoda'

Aeschynanthus 'Black Pagoda' · also called black pagoda lipstick plant · flowering

Aeschynanthus 'Black Pagoda' is a trailing epiphytic lipstick plant grown as much for its foliage as its flowers: fleshy leaves are mottled deep green above with purple-marbled undersides. Orange-yellow tubular blooms appear in flushes. An easy-going hanging-basket gesneriad, it wants bright indirect light, an airy mix, warmth and steady moisture, with a light winter rest to encourage flowering.

Cold limit: USDA 10-11 (indoor in most US homes) · RHS H1b (18-27°C)

Watch for — Reluctant to flower: Often too little light or no winter cool-down. Provide a brief autumn rest (around 13-16°C with slightly drier soil) to encourage bud formation.

What aeschynanthus 'black pagoda''s hardiness rating actually means

Aeschynanthus 'Black Pagoda' 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 10-11 (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 10 °C (sustained cold below this is damaging). Aeschynanthus 'Black Pagoda' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Aeschynanthus 'Black Pagoda' hardiness — frequently asked questions

Is aeschynanthus 'black pagoda' cold hardy?

Aeschynanthus 'Black Pagoda' 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. Aeschynanthus 'Black Pagoda' can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature aeschynanthus 'black pagoda' can survive?

What hardiness zone is aeschynanthus 'black pagoda'?

Aeschynanthus 'Black Pagoda' is rated USDA 10-11 (indoor in most US homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can aeschynanthus 'black pagoda' 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 aeschynanthus 'black pagoda' 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.