Cold hardiness & minimum temperature

Is Pea (Pisum sativum)cold hardy? Hardiness zone & min temp

Also called garden pea, snap pea, snow pea.

About Pea

Pisum sativum · also called garden pea, snap pea · edible

Pea is a cool-season climbing legume that thrives in spring and autumn and finishes by midsummer in most temperate climates. Like beans, peas fix their own nitrogen. Pet-safe by ASPCA standards.

Pisum sativum is one of the oldest domesticated crops, with charred remains in human refuse from about 10,000 years ago at the dawn of agriculture; it is a frost-hardy cool-season legume that thrives in cool, moist weather.

A frost-hardy cool-season crop planted in early spring as soon as soil is workable; it must mature before summer heat arrives, which halts production.

Cold limit: USDA Grown as an annual in zones 3-11 · RHS H5 (hardy in most of UK) (10-21°C)

Watch for — Yellow leaves: Cold wet soil or pea rust.

Sources: extension.umn.edu, extension.psu.edu, extension.illinois.edu

What pea's hardiness rating actually means

Hardiness works differently for pea: 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 H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA Grown as an annual in zones 3-11 — 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 pea 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 pea 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 pea can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Frost protection for borderline pea

Pea 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.

Pea hardiness — frequently asked questions

Is pea cold hardy?

Hardiness works differently for pea: 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. Pea is grown Grown as an annual in zones 3-11; you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature pea 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 pea?

Pea is rated USDA Grown as an annual in zones 3-11 and RHS H5 — Hardy in most of the UK and in cold winters.

Can pea 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 pea 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.