Cold hardiness & minimum temperature

Is Shingle Plant (Rhaphidophora hayi)cold hardy? Hardiness zone & min temp

Also called Shingle plant, Shingle vine, Hayi.

More about shingle plant

About Shingle Plant

Rhaphidophora hayi · also called Shingle plant, Shingle vine · tropical

Rhaphidophora hayi, the shingle plant, is a tropical aroid that climbs flat against surfaces with overlapping leaves like roof shingles. It wants bright indirect light, evenly moist but well-drained soil, warmth, and high humidity on a moss pole. As an aroid it contains calcium oxalates, so keep it away from pets.

Cold limit: USDA 10-12 (outdoors); grown as a houseplant elsewhere (18-29C)

Watch for — Crispy brown leaf edges or tips: Low humidity or underwatering. Raise humidity toward 60%+ with a humidifier or grouping, keep the mix evenly moist, and avoid hot dry drafts.

What shingle plant's hardiness rating actually means

Shingle 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 10-12 (outdoors); grown as a houseplant 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). Shingle Plant has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Shingle Plant hardiness — frequently asked questions

Is shingle plant cold hardy?

Shingle 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. Shingle Plant can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (outdoors); grown as a houseplant elsewhere); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature shingle plant can survive?

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

What hardiness zone is shingle plant?

Shingle Plant is rated USDA 10-12 (outdoors); grown as a houseplant elsewhere and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can shingle plant 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 shingle plant 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.