Cold hardiness & minimum temperature

Is Garden Pea (Pisum sativum 'Kelvedon Wonder')cold hardy? Hardiness zone & min temp

Also called Kelvedon Wonder pea, garden pea, shelling pea.

More about garden pea

About Garden Pea

Pisum sativum 'Kelvedon Wonder' · also called Kelvedon Wonder pea, garden pea · edible

'Kelvedon Wonder' is a reliable early shelling pea bearing well-filled pods of sweet, tender peas on compact plants. A cool-season annual, it crops fast and resists mildew, making it ideal for early and successional sowings. Pick pods young and regularly for the sweetest peas, as sugars convert to starch quickly after harvest.

Cold limit: USDA 2-11 (cool-season annual) · RHS H4 (10-21°C)

What garden pea's hardiness rating actually means

Hardiness works differently for garden 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 H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 2-11 (cool-season annual) — 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 garden 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 garden 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 garden pea can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Frost protection for borderline garden pea

Garden 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.

Garden Pea hardiness — frequently asked questions

Is garden pea cold hardy?

Hardiness works differently for garden 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. Garden Pea is grown 2-11 (cool-season annual); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature garden 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 garden pea?

Garden Pea is rated USDA 2-11 (cool-season annual) and RHS H4 — Hardy in an average winter across much of the temperate world.

Can garden 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 garden 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.