Should You Store Potatoes in the Refrigerator? What Temperature Really Works

The short answer: not for long-term storage, but cold works for specific situations

Potatoes keep longest in a cool, dark place at 45–50°F — which is colder than a pantry but warmer than most refrigerators. A standard fridge runs at 35–40°F, and that temperature converts the potato's starch into sugar faster than you want. The result is a sweeter potato with a gritty texture when cooked, and it browns more easily when you fry it. That said, refrigerator storage is not forbidden; it just trades shelf life for convenience in specific cases.

If you have already cut a potato, or cooked one, or need to keep raw potatoes for only a week or two, the refrigerator is fine. The damage from cold only matters if you are storing whole raw potatoes for weeks. For those, a basement, root cellar, or cool closet will keep them firm and starchy for months.

Key Takeaways

• Whole raw potatoes last longest (weeks to months) in a cool, dark place around 45–50°F, not in the refrigerator.
• Refrigerator storage at 35–40°F converts starch to sugar and softens the potato, but works fine for cut potatoes or short-term storage of a week or two.
• Cooked potatoes and potato dishes should go in the refrigerator and will keep for three to four days in an airtight container.
• Never store potatoes near onions, apples, or other ethylene-producing fruits, whether in the fridge or pantry, because these gases speed sprouting.
• A paper bag in a cool corner is better than plastic for raw potatoes because it allows air circulation and prevents moisture buildup that causes rot.

Why cold storage changes the potato's texture and flavor

Potatoes are sensitive to temperature in a way that surprises most people. Below 50°F, the starch inside the potato begins to convert to sugar. This is not a slow process — it starts immediately. Over days and weeks, the potato becomes noticeably sweeter and the flesh becomes softer and more watery.

This matters most if you plan to fry the potato. When you fry a cold-stored potato, the extra sugar browns the outside much faster than the inside cooks, leaving you with a dark exterior and a raw center. Boiled or mashed potatoes are less affected because the cooking method is gentler, but the texture change is still there — the potato will feel slightly grainy or mealy instead of smooth.

The conversion is reversible if you leave the potato at room temperature for a few days before cooking, but that defeats the purpose of refrigerator storage. For this reason, restaurants and food services that need potatoes to fry properly store them at 50–60°F, not in a standard refrigerator.

When refrigerator storage actually makes sense

Put whole raw potatoes in the refrigerator only if you plan to use them within one to two weeks. At that timeline, the starch-to-sugar conversion is minimal and the convenience of having them cold and ready outweighs the texture loss. This works well if you buy potatoes in small quantities or if your kitchen is warm and you have no cool storage space.

Cut potatoes — whether you have peeled them, cubed them, or sliced them — should go straight into the refrigerator in a container of cold water. Change the water daily. Cut potatoes will keep for three to five days this way. The water prevents browning and keeps the flesh from drying out. Without water, cut potatoes turn gray or brown within hours as the exposed starch oxidizes.

Cooked potatoes and any potato dish — mashed, roasted, in a salad, or in a soup — belong in the refrigerator in an airtight container. They will keep for three to four days. Cooked potatoes are already soft, so the cold does not damage them further. In fact, cold storage slows the growth of bacteria that can cause foodborne illness.

The best storage method for whole raw potatoes

For potatoes you plan to keep for weeks, choose a location that is cool (45–50°F), dark, and well-ventilated. A basement corner, root cellar, garage shelf, or cool closet works well. The darkness matters because light triggers the potato to produce solanine, a compound that makes the skin turn green and tastes bitter. Ventilation matters because potatoes release moisture, and trapped moisture causes rot.

Store potatoes in a paper bag or cardboard box, not plastic. Plastic traps humidity and promotes mold and sprouting. Paper allows air to move around the potatoes and keeps them dry. Do not wash potatoes before storage — the moisture will cause rot. Brush off loose soil, but leave the skin intact and unwashed.

Check your stored potatoes once a week. Remove any that have sprouted, turned soft, or show signs of mold. A single rotting potato can spread decay to others nearby, so do not ignore it. If you find green skin, cut away the green part before cooking; do not eat it.

Why potatoes and onions should never share storage space

Potatoes and onions are often stored together because they have similar temperature needs, but they should not be. Onions release ethylene gas, which speeds sprouting in potatoes. Potatoes stored next to onions will sprout weeks earlier than they should, making them unusable. The same is true for apples, pears, and other fruits that produce ethylene.

If your storage space is small and you must keep them nearby, separate them with a barrier — a shelf, a box, or even a piece of cardboard. Distance matters less than preventing direct contact and air mixing. In a refrigerator, this is easier because you can use different drawers or shelves, but the principle is the same: keep them apart.

Signs that your potatoes have been stored too cold

If you have stored potatoes in the refrigerator for more than two weeks, watch for these changes when you cook them. The potato may taste noticeably sweeter than usual. The texture may be softer or grainier. If you fry them, they may brown very quickly on the outside while the inside is still firm or even raw. These are all signs that starch has converted to sugar.

None of these changes make the potato unsafe to eat. They just mean the cooking result will not be what you expected. If you notice this happening, plan to use those potatoes for mashed potatoes, soups, or stews rather than frying or roasting, where texture matters more.

Frequently Asked Questions

Can I refrigerate potatoes after I have already stored them in the pantry?

Yes. If you have kept potatoes at room temperature and then move them to the refrigerator, the starch-to-sugar conversion will slow down but will not reverse. Use them within a week or two. This works well if your pantry gets too warm or if you suddenly need to make room.

Do sweet potatoes and regular potatoes need different storage?

Yes. Sweet potatoes are more sensitive to cold and should never go in the refrigerator unless they are cooked. Store raw sweet potatoes in a cool, dark place around 55–60°F. They will keep for two to three weeks. Cooked sweet potatoes can be refrigerated for three to four days.

What should I do if my potatoes start to sprout?

Small sprouts can be cut away before cooking and the potato is still safe to eat. Large sprouts or many sprouts mean the potato is using its energy to grow and will taste poor. Discard heavily sprouted potatoes. To slow sprouting, store potatoes away from onions and other ethylene-producing foods, and keep them in the dark.

Is it safe to eat potatoes that have turned green?

Green skin means the potato has been exposed to light and has produced solanine, a bitter compound. Cut away all the green skin before cooking. If the green goes deep into the potato, discard it. A small amount of green skin is safe to remove and cook, but do not eat the green part itself.

How long can I keep potatoes in the refrigerator before they go bad?

Whole raw potatoes will keep for two to three weeks in the refrigerator before texture and flavor noticeably decline. Cut potatoes in water keep for three to five days. Cooked potatoes keep for three to four days. After these timelines, they are still usually safe, but quality drops and the risk of bacterial growth increases.