Cold hardiness & minimum temperature

Is Xanthosoma Mafaffa (Xanthosoma mafaffa)cold hardy? Hardiness zone & min temp

Also called mafaffa, cush-cush, Afro-Caribbean cocoyam.

More about xanthosoma mafaffa

About Xanthosoma Mafaffa

Xanthosoma mafaffa · also called mafaffa, cush-cush · edible

Xanthosoma mafaffa is a tropical cocoyam grown across the Caribbean, Africa and Latin America for its starchy edible corms and tender 'callaloo' leaves. A vigorous, large-leaved aroid, it wants heat, rich moist soil and full to partial sun. Crucially, every part is toxic raw and must be thoroughly cooked before eating.

Cold limit: USDA 9-11 (root-hardy with heavy mulch in 9; grown as a lifted crop elsewhere) · RHS H1c (20-30°C)

Watch for — Cold damage: Frost blackens foliage and cold soil rots corms. Lift and store corms over winter outside the tropics, or mulch heavily at the warm edge of its range.

What xanthosoma mafaffa's hardiness rating actually means

Xanthosoma Mafaffa 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 (root-hardy with heavy mulch in 9; grown as a lifted crop 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). Xanthosoma Mafaffa has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Xanthosoma Mafaffa hardiness — frequently asked questions

Is xanthosoma mafaffa cold hardy?

Xanthosoma Mafaffa 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 Mafaffa can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11 (root-hardy with heavy mulch in 9; grown as a lifted crop elsewhere)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature xanthosoma mafaffa can survive?

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

What hardiness zone is xanthosoma mafaffa?

Xanthosoma Mafaffa is rated USDA 9-11 (root-hardy with heavy mulch in 9; grown as a lifted crop elsewhere) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can xanthosoma mafaffa 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 mafaffa 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.