Cold hardiness & minimum temperature

Is Pellionia daveauana (Pellionia daveauana)cold hardy? Hardiness zone & min temp

Also called Watermelon pellionia, Rainbow vine.

More about pellionia daveauana

About Pellionia daveauana

Pellionia daveauana · also called Watermelon pellionia, Rainbow vine · tropical

Pellionia daveauana is a low, trailing tropical from Southeast Asia in the nettle family, with succulent pinkish stems and oval leaves marbled bronze-green and pale centres, recalling watermelon rind. It creeps and roots as it spreads, thriving in warm, humid, moderately lit spots. Excellent for terrariums, hanging pots, and ground cover under taller plants, it propagates effortlessly.

Cold limit: USDA 11-12 (indoor in most US and UK homes) · RHS H1b (18-27°C)

Watch for — Browning, crisping leaf edges: Low humidity or dry heated air causes edge browning. Raise humidity with a terrarium or pebble tray and keep the plant away from radiators and cold draughts.

What pellionia daveauana's hardiness rating actually means

Pellionia daveauana 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 11-12 (indoor in most US and UK 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). Pellionia daveauana has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Pellionia daveauana hardiness — frequently asked questions

Is pellionia daveauana cold hardy?

Pellionia daveauana 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. Pellionia daveauana can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (indoor in most US and UK homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature pellionia daveauana can survive?

What hardiness zone is pellionia daveauana?

Pellionia daveauana is rated USDA 11-12 (indoor in most US and UK homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can pellionia daveauana 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 pellionia daveauana 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.