Some of the best food storage requires no canning jars, no freezer, and no electricity at all. Potatoes, onions, garlic, and winter squash are nature's keepers — cure and store them properly and they'll feed you straight through winter from a cool corner of your home. Learning how to store potatoes and other long-keeping crops is one of the oldest, simplest self-sufficiency skills there is.
Here's how to make your fall harvest last for months.
The two rules of long storage
Before the specifics, understand what every long-keeping crop needs:
- Cure first. Curing toughens the skins and heals small nicks so produce resists rot. Skip it and your crops spoil fast.
- Then store cool, dark, and dry (with the right humidity). Most keepers want temperatures around 35–50°F — a cool basement, garage, or unheated closet. The big exception is squash, which likes it warmer.
Get curing and conditions right and the rest is easy.
Potatoes
- Cure freshly dug potatoes for 1–2 weeks in a dark, humid, well-ventilated spot around 50–60°F. This thickens the skins.
- Don't wash them before storing — just brush off loose dirt. Washing invites rot.
- Store in a cool (38–45°F), dark, humid spot in a breathable container: a paper bag, basket, or ventilated bin. Darkness is critical — light turns potatoes green and bitter.
- Keep them away from onions and apples. Onions release moisture and apples give off ethylene gas, both of which make potatoes sprout faster.
Stored well, potatoes keep for 3–6 months.
Onions and garlic
These two are the easiest keepers of all, and they store the same way:
- Cure until the necks are completely dry and papery and the outer skins rustle — usually 2–4 weeks in a warm, dry, airy spot out of direct sun.
- Store somewhere cool and dry (35–50°F, low humidity) — the opposite of potatoes, which like humidity. A mesh bag, braid, or basket in a dry pantry is perfect.
- Use thick-necked onions first — they don't keep as long as those that cured down to a tight, dry neck.
Properly cured onions last 3–6 months; hardneck garlic 4–6 months and softneck garlic up to 9–12. (Grew your own? Here's our full guide to growing garlic at home.)
Winter squash and pumpkins
Butternut, acorn, spaghetti squash, and pumpkins are champion keepers — if you cure them:
- Leave a 2–3 inch stem attached when you harvest. A broken stem is an open door for rot.
- Cure for 1–2 weeks somewhere warm (around 80°F) and dry to harden the skin.
- Store at a milder temperature than other crops — 50–60°F, dry, and not touching each other so air can circulate.
- Butternuts can keep 3–6 months; acorn squash is shorter-lived, so eat those first.
You don't need a real root cellar
A traditional root cellar is ideal, but you can mimic one in any home:
- An unheated basement, garage, or mudroom that stays cool but above freezing.
- An insulated closet against a north-facing exterior wall.
- A second fridge set to its warmest setting for smaller quantities.
- A cooler or insulated bin in an unheated space, with a thermometer to monitor it.
The goal is simply: cool, dark, dry, and steady. Check your stash every couple of weeks and pull anything starting to soften — "one bad apple" really does spoil the bunch.
A quick storage cheat sheet
| Crop | Cure | Store temp | Humidity | Keeps |
|---|---|---|---|---|
| Potatoes | 1–2 wks, ~55°F | 38–45°F | High | 3–6 mo |
| Onions | 2–4 wks, warm/dry | 35–50°F | Low | 3–6 mo |
| Garlic | 2–4 wks, warm/dry | 35–50°F | Low | 4–12 mo |
| Winter squash | 1–2 wks, ~80°F | 50–60°F | Low | 2–6 mo |
Frequently asked questions
Why can't I store potatoes and onions together?
Onions give off moisture and gases that cause potatoes to sprout and rot faster. Keep them in separate areas.
Can I store these in the refrigerator?
Onions, garlic, and squash do fine in cool dry storage and don't need the fridge. Potatoes actually dislike the fridge — the cold converts their starch to sugar, turning them gritty and sweet. A cool pantry is better.
My harvest was small — is this still worth it?
Absolutely. Even a basket of potatoes and a braid of onions in a cool closet stretches your harvest for months with zero effort or equipment.
What other crops store this way?
Carrots, beets, turnips, and other root vegetables keep well packed in damp sand or sawdust in a cold, humid spot — another classic root-cellar trick.
Long-term food storage doesn't have to mean a weekend of canning. With nothing more than curing and a cool, dark corner, your potatoes, onions, garlic, and squash will keep feeding you well into winter — the simplest, most low-tech preservation skill on any homestead.