Cold hardiness & minimum temperature

Is Alocasia Stingray (Alocasia macrorrhiza 'Stingray')cold hardy? Hardiness zone & min temp

Also called Alocasia Stingray, Stingray Alocasia, Stingray Elephant Ear.

More about alocasia stingray

About Alocasia Stingray

Alocasia macrorrhiza 'Stingray' · also called Alocasia Stingray, Stingray Alocasia · houseplant

Alocasia Stingray is a striking aroid prized for ribbed, wing-shaped leaves with a long tapered tail resembling a stingray. It wants bright indirect light, evenly moist but never soggy soil, warmth, and high humidity. An ASPCA-listed toxic plant (calcium oxalates), it is unsafe for cats, dogs, and horses, so keep it well out of reach.

Cold limit: USDA USDA zones 9b-11 outdoors; grown as a houseplant elsewhere (18-30 C (avoid below 13 C))

Watch for — Sudden leaf drop / winter dormancy: Alocasias can drop leaves or go semi-dormant in cool, low-light winter conditions. Reduce watering, keep the corm warm and barely moist, and growth typically resumes in spring.

What alocasia stingray's hardiness rating actually means

Alocasia Stingray 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 USDA zones 9b-11 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 10 °C (sustained cold below this is damaging). Alocasia Stingray has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Alocasia Stingray hardiness — frequently asked questions

Is alocasia stingray cold hardy?

Alocasia Stingray 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. Alocasia Stingray can only live outside year-round in genuinely frost-free climates (roughly USDA USDA zones 9b-11 outdoors; grown as a houseplant elsewhere); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature alocasia stingray can survive?

What hardiness zone is alocasia stingray?

Alocasia Stingray is rated USDA USDA zones 9b-11 outdoors; grown as a houseplant elsewhere and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can alocasia stingray 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 alocasia stingray 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.