Cold hardiness & minimum temperature

Is Chayote (Sechium edule)cold hardy? Hardiness zone & min temp

Also called Chayote, Choko, Christophine, Mirliton, Vegetable Pear, Cho-cho.

More about chayote

About Chayote

Sechium edule · also called Chayote, Choko · edible

Chayote is a perennial cucurbit grown as an annual in temperate regions, producing abundant pale-green, pear-shaped fruits with mild, crisp flesh popular across Latin American, Caribbean, and Asian cuisines. The roots, young shoots, and seeds are also edible. It is prolific, vigorous, and frost-sensitive, requiring a long warm season and strong trellis support.

Cold limit: USDA 8–12 (perennial in frost-free zones; annual elsewhere) · RHS H2 (18–30°C)

Watch for — Frost damage: Chayote is frost-intolerant and vines die back at the first frost. In USDA zones 8–10, the root may survive and resprout. In colder zones, mulch the root heavily after top-growth dies, or treat as an annual and replant annually.

What chayote's hardiness rating actually means

Hardiness works differently for chayote: it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". Its RHS rating of H2 means: Tender — survives a frost-free greenhouse or a very mild, sheltered spot. On the US scale that maps to USDA 8–12 (perennial in frost-free zones; annual 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

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

Concretely, for chayote as it gets too cold:

Light frost (around 0 to −2 °C) damages or kills tender summer crops outright; cold-hardy types take a few degrees of frost.
The plant does not "survive winter" — its life cycle simply ends, by design, when frost arrives or it finishes cropping.
A surprise late spring frost can also kill young transplants set out too early, before the season even starts.

Can chayote go outside or overwinter — and where?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost.
In short-season zones, start it indoors or under cover to stretch the effective growing window.
Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

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 chayote can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H2 figure above.

Frost protection for borderline chayote

Chayote is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks.
Have row cover ready for an unexpected late spring or early autumn frost.
Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.

Chayote hardiness — frequently asked questions

Is chayote cold hardy?

Hardiness works differently for chayote: it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". A seasonal crop, not a perennial. Chayote is grown 8–12 (perennial in frost-free zones; annual elsewhere); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature chayote can survive?

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

What hardiness zone is chayote?

Chayote is rated USDA 8–12 (perennial in frost-free zones; annual elsewhere) and RHS H2 — Tender — survives a frost-free greenhouse or a very mild, sheltered spot.

Can chayote survive winter outside?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost. In short-season zones, start it indoors or under cover to stretch the effective growing window. Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

How do I protect chayote from frost?

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks. Have row cover ready for an unexpected late spring or early autumn frost. Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.