Cold hardiness & minimum temperature
Is Snap peas (Pisum sativum)cold hardy? Hardiness zone & min temp
Also called sugar snap peas, edible-pod peas.
About Snap peas
Pisum sativum · also called sugar snap peas, edible-pod peas · edible
Sugar snap peas are cool-season legumes grown for sweet edible pods eaten whole. Cooler than common peas, more productive, and a cool-season favourite. Pet-safe and dog-friendly fresh from the vine.
Sugar snap peas are an edible-pod form of the garden pea, Pisum sativum, an Old World cool-season annual legume bred for thick, sweet, non-fibrous pods.
Vining types climb to about 5 feet and need a trellis (bush types 2 to 3 feet); harvest sugar snaps when pods look almost filled with peas yet stay sweet, juicy and tender, eaten pod and all. Production stops once heat exceeds about 85F. Roughly 60 days to maturity.
Cold limit: USDA Grown as a cool-season annual in zones 2-11 · RHS H5 (13-21°C)
Watch for — No germination: Soil too cold (<5°C) or too wet — rots before sprouting.
Sources: extension.umn.edu, extension.oregonstate.edu
What snap peas's hardiness rating actually means
Hardiness works differently for snap peas: 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 a cool-season annual in zones 2-11 — 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 snap peas 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 snap peas 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 snap peas 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 snap peas
Snap peas 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.
Snap peas hardiness — frequently asked questions
Is snap peas cold hardy?
Hardiness works differently for snap peas: 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. Snap peas is grown Grown as a cool-season annual in zones 2-11; you sow after the last frost and harvest before the first one, then start again next year.
What is the minimum temperature snap peas 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 snap peas?
Snap peas is rated USDA Grown as a cool-season annual in zones 2-11 and RHS H5 — Hardy in most of the UK and in cold winters.
Can snap peas 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 snap peas 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.
Keep reading
- Snap peas care — the full brief (light, water, soil, problems, pet safety)
- USDA hardiness zones — find yours and what grows there
- RHS hardiness ratings — the UK system explained
- Frost-date calculator — your real outdoor window
- The USDA hardiness zone map, explained
- Is tomato cold hardy?
- Is pepper cold hardy?
- Is cucumber cold hardy?
- All 200plant hardiness & min-temp guides