๐ฅ Vegetables
Harvesting and Storing Winter Squash
How to harvest and store winter squash and pumpkins in the UK โ when to cut, how to cure the skins, and keeping them sound for months over winter.
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The short version
- Harvest late September into October โ once the skin is hard (a thumbnail leaves no mark) and the stem has started to dry.
- Always cut before the first frost โ frost ruins their keeping quality, so bring them all in when a hard night is forecast.
- Leave 5โ10cm of stem โ it's your handle and seals the top against rot; never carry a squash by the stem.
- Cure for 10โ14 days somewhere warm, dry and airy โ around 20ยฐC hardens the skin so they last for months.
- Then store cool, dry and frost-free (10โ15ยฐC) โ single layer, not touching, and check weekly for soft patches.
- Carving pumpkins are the exception โ bred for show, they only keep a few weeks, so eat or carve them promptly.
The whole point of a winter squash is that it keeps. Get the harvest and curing right and you can be eating your own butternut or crown prince in January. Get it wrong and they go soft in a fortnight. Here is the short version. For growing them in the first place, see the main squash growing guide.
When to harvest
Winter squash are ready when the skin is hard. Press a thumbnail into it โ if it leaves no mark, it is ripe. The plant tells you too: the leaves die back, the colour deepens, and the stem connecting the fruit to the vine starts to dry and cork over.
In most of the UK that means late September into October. The hard rule is to get them in before the first frost โ frost damages the skin and ruins their keeping quality. Use the frost-date checker for your area and keep an eye on the forecast from mid-September.
Quick UK timing
Harvest from late September to late October. Always cut before the first hard frost โ a covered night-time forecast is your signal to bring them all in.
Cut each squash with a good length of stem still attached โ around 5โ10cm. That stub is your handle, and it seals the top against rot. Never carry a squash by the stem; if it snaps off, that fruit won't store and should be eaten first.
Curing the skins
Curing hardens the skin further and heals small nicks, which is what lets a squash last for months. It also sweetens the flesh as some of the starch turns to sugar.
Stand the cut squash somewhere warm, dry and airy for 10โ14 days โ around 20ยฐC is ideal. A sunny windowsill, a warm greenhouse, a conservatory, or even an airing cupboard all work. Sit them on newspaper or a slatted shelf so air moves around all sides, and turn them every few days.
A sunny spell helps
If you get a dry, warm autumn week, you can cure squash outdoors in full sun โ just bring them under cover at night and the moment rain or frost threatens.
You'll know curing has worked when the skin sounds slightly hollow when tapped and the stem is fully dry and corky.
Storing
Once cured, move them somewhere cool, dry and frost-free โ a spare bedroom, a frost-free shed, a porch or under a bed. Aim for around 10โ15ยฐC. Too warm and they dry out; too cold (or frosty) and they spoil.
Two rules matter most:
- Don't let them touch. Lay them out in a single layer on a shelf, slatted rack or in egg-box-style dimples so air circulates and one bad fruit can't infect its neighbour.
- Check them weekly. Any squash showing a soft patch, mould or a weeping stem should come out straight away and be used or composted.
Damp is the enemy. A dry shed beats a cold-but-damp garage every time. The same cool, dry, single-layer principle works for storing cabbages over winter โ autumn is the season for getting your stores sorted.
Pumpkins are the exception
Carving pumpkins and the big Halloween types are bred for show, not flavour or keeping. Most last only a few weeks. Eat or carve them soon after growing pumpkins for Halloween rather than expecting them to store.
How long they keep by type
Keeping quality varies a lot by variety. As a rough UK guide, once well cured and properly stored:
| Type | Keeps for | Notes |
|---|---|---|
| Butternut | 3โ6 months | Excellent keeper; needs a long, warm autumn to ripen fully |
| Crown Prince | 5โ6 months | One of the very best for storage and flavour |
| Acorn | 2โ3 months | Eat earlier in the winter |
| Spaghetti squash | 2โ3 months | Good but not a long-haul keeper |
| Onion / Uchiki Kuri | 3โ4 months | Reliable, beginner-friendly |
| Carving pumpkins | 2โ6 weeks | Use promptly; not for long storage |
Check your stores through the winter and eat the thinner-skinned types first, saving the best keepers like crown prince for late winter.
When you're ready to grow more, the squash growing guide covers varieties and sowing, and you can browse the full range of vegetable guides for what to put in next.
Frequently asked questions
When do you harvest winter squash?
How do you cure and store pumpkins?
Keep reading
How to Grow Pumpkins and Squash in the UK
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Storing Cabbages Over Winter
How to store cabbages over winter in the UK โ leaving hardy types in the ground, harvesting and hanging firm heads, and keeping cabbage for months.
How to Grow Broad Beans at Home in the UK
Grow broad beans in the UK โ autumn and spring sowing, supporting the plants, pinching out for blackfly, and picking tender beans from one of the easiest crops.