Why You Shouldn't Store Potatoes in the Refrigerator (And Where to Keep Them Instead)

Refrigerator storage turns potatoes into sugar and makes them taste worse

No, it is not okay to store potatoes in the refrigerator. Cold temperatures below 50°F convert the starch in potatoes into sugar, which changes both the flavor and the texture when you cook them. You will end up with potatoes that taste sweet, brown too quickly when fried, and have a gritty or grainy texture instead of the smooth, creamy interior you expect. This chemical change happens within days of refrigeration and is largely irreversible, even if you warm the potatoes back up.

The cold also damages the cell walls of the potato, causing them to break down faster and making the potatoes spoil more quickly overall. If you have already refrigerated potatoes by accident, you can still eat them—they are not unsafe—but they will not cook the way you intended. The best approach is to store potatoes at room temperature in a cool, dark place from the start.

Key Takeaways

• Potatoes stored below 50°F convert starch to sugar, making them taste sweet and brown too fast when cooked.
• The ideal storage temperature for potatoes is between 45°F and 50°F in a dark place, which is cooler than most kitchens but warmer than any refrigerator.
• A pantry, basement, or unheated closet works better than the refrigerator because it keeps potatoes cool without triggering the starch-to-sugar conversion.
• Potatoes stored correctly in a dark, cool place last two to four weeks, while refrigerated potatoes spoil faster and develop off-flavors within days.
• If you have already refrigerated potatoes, let them sit at room temperature for 24 hours before cooking to partially reverse the starch conversion.

The science behind why cold damages potatoes

When potatoes sit in temperatures below 50°F, an enzyme called phosphorylase becomes active and begins breaking down starch molecules into glucose and other simple sugars. This is a natural survival mechanism—the potato is trying to generate energy to survive the cold. The problem is that these sugars change how the potato behaves in the kitchen. Sugars brown much faster than starch during frying or roasting, which means your potatoes will scorch on the outside before the inside cooks through.

The cold also damages the cell structure of the potato itself. Refrigeration causes ice crystals to form inside the cells, which ruptures the cell walls. Once those walls break, the potato loses its structural integrity and becomes mushy or watery when cooked. Additionally, the damaged cells release their contents more easily, which accelerates spoilage and allows bacteria to colonize the potato faster. This is why refrigerated potatoes often develop soft spots or mold within a week, while properly stored potatoes last much longer.

Where to store potatoes instead

The ideal storage spot for potatoes is a cool, dark, well-ventilated place that stays between 45°F and 50°F. A basement, root cellar, or unheated closet is perfect. If you do not have access to a space that cold, a pantry or kitchen cabinet away from direct sunlight will work, though potatoes will not last quite as long. The key is darkness—light exposure causes potatoes to turn green and develop solanine, a compound that tastes bitter and can cause digestive upset in large amounts.

Store potatoes in a paper bag, burlap sack, or cardboard box rather than plastic. Potatoes need air circulation to prevent moisture buildup, which leads to rot. Plastic bags trap humidity and create an environment where mold and bacteria thrive. Keep potatoes separate from onions and other produce that release ethylene gas, which speeds up sprouting and decay. A small ventilated bin or basket works well if you want to keep them organized and visible.

Temperature stability matters more than the exact temperature. Potatoes stored in a place that fluctuates between warm and cold will sprout and spoil faster than potatoes kept consistently cool. If your kitchen is warm, moving potatoes to a cooler room for storage is worth the effort.

How long potatoes last in proper storage

Potatoes stored in a cool, dark, well-ventilated space last two to four weeks, depending on the variety and how fresh they were when you bought them. Waxy potatoes like red potatoes and fingerlings last slightly longer than starchy varieties like russets. If you notice a potato starting to sprout, you can cut off the sprout and the surrounding area and use the rest of the potato—sprouting does not make the potato unsafe, just less pleasant to eat.

Once a potato develops soft spots, mold, or a strong smell, throw it away. A few small sprouts are fine to remove, but widespread sprouting or decay means the potato has used up its stored energy and will not cook well. If you buy potatoes in bulk and cannot use them within a month, consider storing some in a freezer after cooking them. Cooked potatoes freeze well and last three to four months, though raw potatoes do not freeze successfully because the ice crystals destroy the texture.

What to do if you have already refrigerated potatoes

If you accidentally stored potatoes in the refrigerator, remove them and let them sit at room temperature for 24 hours before cooking. This allows some of the glucose to convert back into starch, which will improve the texture and flavor somewhat. The conversion will not be complete, but it will help. You can still cook and eat refrigerated potatoes—they are perfectly safe—but expect them to brown faster and have a slightly different taste than potatoes stored at room temperature.

For the best results with refrigerated potatoes, use them in dishes where the texture matters less, such as mashed potatoes, soups, or potato salads. Avoid frying or roasting them, since the excess sugar will cause them to brown too quickly and unevenly. If you have a choice, use room-temperature potatoes for frying and save the refrigerated ones for boiling or steaming.

Potatoes versus other root vegetables in the refrigerator

Unlike potatoes, carrots, beets, and parsnips actually benefit from refrigerator storage. These vegetables do not contain the same starch-to-sugar conversion enzyme, so cold temperatures do not damage their flavor. Carrots and beets last longer in the refrigerator than at room temperature, and the cold slows their natural decay. Onions and garlic, like potatoes, should be stored at room temperature in a cool, dark place.

The confusion often arises because potatoes and other root vegetables look similar and are often grouped together in storage guides. The key difference is starch content and enzyme activity. Potatoes are unique among common root vegetables in their sensitivity to cold, so they need their own storage strategy.

Frequently Asked Questions

Can I store potatoes in the refrigerator crisper drawer?

No. The crisper drawer is still cold enough to trigger starch-to-sugar conversion, even though it is slightly warmer than the rest of the refrigerator. Potatoes will develop the same sweet flavor and browning problems in the crisper as they do on a regular shelf. A cool pantry or basement is a much better choice.

What temperature should my storage spot be?

Aim for 45°F to 50°F. This is cool enough to slow sprouting and decay without being cold enough to convert starch to sugar. If you do not have a thermometer, a space that feels cool but not cold—like an unheated closet or basement—is usually in the right range. Avoid anywhere that gets warm or experiences temperature swings.

Do I need to wash potatoes before storing them?

No. Washing potatoes before storage removes the protective layer of soil and increases moisture, which speeds up decay. Store potatoes unwashed and wash them just before cooking. If they are very dirty, you can brush off loose soil gently, but do not rinse them.

Why do potatoes turn green in the refrigerator?

Potatoes turn green when exposed to light, not specifically because of refrigeration. However, if you store potatoes in a clear container in the refrigerator, light exposure combined with cold will cause greening faster. Green potatoes contain solanine and should not be eaten. Always store potatoes in a dark container or bag, whether at room temperature or in cold storage.

Can I store cut potatoes in the refrigerator?

Yes. Once potatoes are cut, the starch-to-sugar conversion is less of a concern because the potato is no longer alive and actively responding to cold. Cut potatoes can be stored in the refrigerator in an airtight container or covered bowl for three to four days. Submerge them in water to prevent browning, and change the water daily if storing longer than one day.