Cold hardiness & minimum temperature

Is Xanthosoma 'Lime Zinger' (Xanthosoma sagittifolium 'Lime Zinger')cold hardy? Hardiness zone & min temp

Also called Lime Zinger Elephant Ear.

More about xanthosoma 'lime zinger'

About Xanthosoma 'Lime Zinger'

Xanthosoma sagittifolium 'Lime Zinger' · also called Lime Zinger Elephant Ear · tropical

Xanthosoma 'Lime Zinger' is a bold tropical elephant ear grown for huge glossy chartreuse arrow-shaped leaves that glow lime-green in good light. Fast and dramatic in warm, humid, brightly lit conditions, it makes a statement in containers or borders. It is hungry and thirsty in growth, frost-tender, and best lifted or sheltered in cool climates.

Cold limit: USDA 9-11 (tender; lift the tuber or overwinter frost-free in cooler zones) · RHS H1c (20-30°C)

Watch for — Frost or cold damage: It is frost-tender; collapse follows chilling, so move indoors or lift the tuber before cold weather.

What xanthosoma 'lime zinger''s hardiness rating actually means

Xanthosoma 'Lime Zinger' 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 9-11 (tender; lift the tuber or overwinter frost-free in cooler zones) — 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). Xanthosoma 'Lime Zinger' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Xanthosoma 'Lime Zinger' hardiness — frequently asked questions

Is xanthosoma 'lime zinger' cold hardy?

Xanthosoma 'Lime Zinger' 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. Xanthosoma 'Lime Zinger' can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11 (tender; lift the tuber or overwinter frost-free in cooler zones)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature xanthosoma 'lime zinger' can survive?

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

What hardiness zone is xanthosoma 'lime zinger'?

Xanthosoma 'Lime Zinger' is rated USDA 9-11 (tender; lift the tuber or overwinter frost-free in cooler zones) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can xanthosoma 'lime zinger' 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 xanthosoma 'lime zinger' 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.