Why Potatoes Don't Belong in the Refrigerator (And Where to Store Them Instead)

Refrigerator storage turns potatoes starchy and sweet—avoid it

No, you should not store potatoes in the refrigerator. Cold temperatures convert the potato's starches into sugars, which changes the texture and flavor in ways you cannot reverse by cooking. The potato becomes grainier, develops an unpleasant sweetness, and browns faster when you fry or roast it. This chemical change happens within days of refrigeration, even if the potato looks fine on the outside.

Potatoes also release moisture in the cold, which can lead to a mealy or watery texture when cooked. If you have already refrigerated potatoes by accident, they are still safe to eat—the cold does not make them unsafe—but the quality will suffer noticeably. The good news is that potatoes store beautifully at room temperature for weeks or months if you follow a few simple rules.

Key Takeaways

• Cold temperatures convert potato starches to sugars, making them taste sweet and cook unevenly; this damage is permanent.
• Store potatoes in a cool, dark, well-ventilated place like a pantry or basement, ideally between 45°F and 50°F.
• Keep potatoes away from onions, apples, and other ethylene-producing foods, which speed up sprouting and decay.
• Paper bags or cardboard boxes work better than plastic, because potatoes need air circulation to prevent mold and rot.
• Discard any potato with green skin, soft spots, or sprouting eyes, as these indicate solanine buildup or advanced decay.

The science behind why cold damages potatoes

When potatoes sit in temperatures below 50°F, an enzyme called acid phosphatase becomes active and begins breaking down starches into reducing sugars. This process is called cold-induced sweetening, and it happens even in the dark. The sugars accumulate in the potato's cells and change how it cooks—it browns too quickly, develops an off flavor, and loses the fluffy texture you want from a baked potato or fries.

The damage is not reversible. Bringing the potato back to room temperature does not undo the starch-to-sugar conversion. If you have refrigerated potatoes and want to use them anyway, cook them as soon as possible; the longer they sit in the cold, the more pronounced the problem becomes. For best results, plan ahead and store potatoes at room temperature from the start.

The ideal storage location for potatoes

Potatoes need a cool, dark, well-ventilated space—ideally between 45°F and 50°F. A pantry, basement, root cellar, or unheated garage works well. The key is darkness: light exposure causes potatoes to develop green skin, which signals the buildup of solanine, a naturally occurring compound that tastes bitter and can cause stomach upset in large amounts. Any potato with green patches should be cut away or discarded entirely.

Ventilation matters as much as temperature. Potatoes release moisture as they age, and stagnant air traps that moisture, leading to mold and rot. A cardboard box with holes punched in the sides, a paper bag, or a mesh produce bag all allow air to circulate. Avoid plastic bags and airtight containers, which create humid microclimates where decay spreads quickly.

If your home is warmer than 50°F year-round, store potatoes in the coolest spot available—a basement corner, a shaded closet away from heating vents, or even a cool cupboard. Potatoes stored at room temperature (around 70°F) will sprout and age faster than those in a cool space, but they will still last longer than refrigerated potatoes and will taste normal when cooked.

Keep potatoes away from onions and other problem foods

Onions, apples, bananas, and avocados all produce ethylene gas as they ripen and age. Ethylene accelerates sprouting and decay in potatoes stored nearby. If you keep onions and potatoes in the same pantry or box, the potatoes will sprout within days instead of weeks. Store onions and potatoes in separate containers or on different shelves, ideally with at least a few feet of distance between them.

Potatoes also release ethylene themselves, so do not store them in a sealed container with other vegetables. The gas builds up and speeds aging across the board. A well-ventilated space solves this problem naturally—the ethylene disperses into the air instead of concentrating around the potatoes.

Signs a potato has gone bad and should be discarded

A potato is no longer safe to eat if it has soft or mushy spots, visible mold, or a strong sour smell. Discard it immediately. Sprouting is not a safety issue—you can cut the sprouts off and use the rest of the potato—but sprouted potatoes are losing starch to the sprout and will not cook as well. Use sprouted potatoes first.

Green skin or green flesh indicates solanine buildup. Cut away all green areas generously—do not just peel the skin. If the green goes deep into the potato, discard it. Solanine tastes bitter and can cause nausea or stomach cramps if you eat enough of it, though the amount in a small patch is usually harmless. When in doubt, throw it out; potatoes are inexpensive enough that the risk is not worth it.

What to do if you have already refrigerated potatoes

If potatoes have been in the refrigerator for a day or two, remove them and let them sit at room temperature for 24 hours before cooking. This does not reverse the starch-to-sugar conversion, but it may reduce some of the texture problems. The potato will still taste sweeter and cook faster than a room-temperature potato, but the effect will be less severe.

If the potatoes have been refrigerated for more than a week, use them for mashed potatoes or potato soup, where the texture change is less noticeable. Avoid frying or roasting them, because the high heat will cause excessive browning and the sweetness will be very obvious. Going forward, store new potatoes in a cool, dark pantry or basement instead.

Storing cut or cooked potatoes

Once you cut a raw potato, it begins to oxidize and lose quality quickly. If you must cut potatoes ahead of time, submerge them in cold water in a covered container and refrigerate them for up to 24 hours. The water prevents browning and keeps the texture firmer than it would be in air. Drain and use them the next day.

Cooked potatoes are different—they have already been heated, so refrigeration does not cause the starch-to-sugar problem. Store cooked potatoes in an airtight container in the refrigerator for up to four days. Reheat them gently to avoid drying them out further.

Frequently Asked Questions

Can I store potatoes in the freezer?

Raw potatoes do not freeze well—ice crystals rupture the cell walls and turn them mushy when thawed. Cooked potatoes freeze better but still lose quality. If you want to freeze potatoes, cook them first, cool them completely, and store them in an airtight freezer bag for up to three months. Thaw them in the refrigerator overnight before reheating.

How long do potatoes last at room temperature?

Potatoes stored in a cool, dark, well-ventilated space last two to three months. At warmer room temperature (around 70°F), they last two to three weeks before sprouting becomes noticeable. Check them weekly and remove any that show soft spots or mold before decay spreads to the others.

Is it safe to eat a potato that has sprouted?

Yes, sprouted potatoes are safe to eat. Cut away the sprouts and any green skin, then cook as normal. Sprouted potatoes have lost some starch to the sprout, so they may not cook quite as well, but they are not toxic. Use them soon after sprouting appears, because the longer the sprout grows, the more starch is lost.

Why do potatoes turn green in storage?

Green skin develops when potatoes are exposed to light. The potato produces chlorophyll (the same pigment that makes plants green) and also builds up solanine, a bitter compound. Store potatoes in complete darkness to prevent this. If green appears, cut it away before cooking.

Can I store potatoes in a paper bag instead of a box?

Yes, paper bags work well for potato storage as long as they allow air circulation. Avoid sealing the bag tightly. A loosely folded paper bag or a bag with small holes punched in it will keep potatoes dark while letting moisture escape. Check them weekly for sprouting or decay.