Cold hardiness & minimum temperature

Is Chempedak (Artocarpus integer)cold hardy? Hardiness zone & min temp

Also called Chempedak, Champedak.

More about chempedak

About Chempedak

Artocarpus integer · also called Chempedak, Champedak · tropical

Chempedak is a Southeast Asian relative of jackfruit grown for its sweet, aromatic, custard-like fruit. A medium to large evergreen tree, it demands constant heat, high humidity, full sun and deep, fertile, well-drained soil. It is intolerant of frost and dryness. Like its kin, cut surfaces ooze a sticky white latex.

Cold limit: USDA 10-12 (frost-tender; glasshouse in most US and UK) · RHS H1a (22-32°C)

Watch for — Frost and chill sensitivity: Temperatures below about 5°C damage foliage and can be fatal; it must be grown frost-free, indoors or under glass in temperate regions.

What chempedak's hardiness rating actually means

Chempedak 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 H1a means: Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever. On the US scale that maps to USDA 10-12 (frost-tender; glasshouse in most US and UK) — 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 above about 15 °C (warm, never cold). Chempedak has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for chempedak as it gets too cold:

Below about above about 15 °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 chempedak go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above above 15 °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 chempedak can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

Chempedak hardiness — frequently asked questions

Is chempedak cold hardy?

Chempedak 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. Chempedak can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (frost-tender; glasshouse in most US and UK)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature chempedak can survive?

Minimum survivable temperature is roughly above about 15 °C (warm, never cold). Chempedak has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is chempedak?

Chempedak is rated USDA 10-12 (frost-tender; glasshouse in most US and UK) and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can chempedak survive winter outside?

It can holiday outdoors in summer once nights are reliably above above 15 °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 chempedak below its minimum temperature?

Below about above about 15 °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.