How long do potatoes last?

Raw whole potatoes keep one to two months in a cool, dark pantry at 45-50°F (7-10°C), and just one to two weeks at typical kitchen counter temperatures. The refrigerator isn't the right answer for raw potatoes (the starch starts turning to sugar below 40°F), and the freezer doesn't work for them at all unless they're cooked first. The bigger questions tend to be about the cosmetic stuff: green skin, sprouts, soft spots. Food-safety guidance has clear lines on what to cut, what to keep, and what to throw out.

Pantry vs counter vs fridge

How long raw whole potatoes keep depends mostly on temperature. USDA's FoodKeeper gives a pantry figure, and warmer or colder conditions shift it from there:

• Cool dark pantry (45-50°F / 7-10°C): 1 to 2 months, the FoodKeeper pantry figure. Best case, old root cellar, unheated mudroom, basement cabinet.
• Cool counter (room temperature, 60-70°F / 15-21°C): closer to 1 to 2 weeks. Warmer than a pantry, so the window shrinks. Most U.S. kitchen pantries fall here.
• Refrigerator (35-40°F / 2-4°C): colder, but not recommended for raw whole potatoes. Cold storage causes starch-to-sugar conversion that affects taste and cooking behavior. (Cooked potatoes are a different story, those belong in the fridge.)

Sweet potatoes follow a slightly tighter window: 3-5 weeks in cool storage, shorter than the 1 to 2 months whole potatoes get, plus 1-2 weeks on the counter, also not recommended for the fridge.

Why the fridge isn't ideal for raw potatoes

Two things happen below 40°F (4°C):

• Starches convert to sugars. Potatoes are mostly starch when stored at 50°F or warmer. In the fridge, enzymes break some of that starch into glucose and fructose. The potato tastes noticeably sweeter and browns much faster when roasted or fried, the extra sugar caramelizes (and can form acrylamide, a compound the FDA has flagged for further study).
• Chilling injury. Potatoes evolved to be stored underground at root-cellar temps, not refrigerator temps. Cold storage can soften the flesh and shorten the usable life once the potato is back at room temperature.

The right home equivalent of a root cellar is a paper bag in a closed cabinet that doesn't sit next to the oven or above the dishwasher. Ventilation matters. Sealed plastic traps moisture and accelerates rot.

Green skin and solanine

Solanine is a natural glycoalkaloid that potatoes produce when exposed to light. It tastes bitter and is mildly toxic in high doses (the threshold is well above what you'd accidentally eat, but enough to cause nausea or worse).

General food-safety guidance is straightforward:

• Small green patches: peel away the green skin plus a margin of flesh underneath, a common rule of thumb is at least 1/4 inch (0.6 cm). The rest is safe.
• Extensively green or bitter-tasting: discard. Solanine concentrates near the green areas and is heat-stable, so cooking does not destroy it.
• Storage fix: keep potatoes in the dark. Cabinets, paper bags, or burlap sacks. The light from a sunny windowsill is enough to start greening within a few days.

Sprouts: cut off or discard?

A potato sprouts because it's trying to grow. Sprouts mean the storage temperature was a bit warm or the potato has been sitting for a while. Like green areas, sprouts concentrate solanine and a related alkaloid called chaconine.

The line:

• Small sprouts (under 1 inch / 2.5 cm) on a firm potato: cut the sprouts off plus a small margin, use the potato right away.
• Large sprouts, soft wrinkled potato, or both: discard.
• Sprouts forming faster than usual: storage temperature is too warm or there's an ethylene-producing fruit nearby (apples, bananas, onions all speed sprouting).

If half your bag is sprouting every week, the storage spot is the problem, not the potatoes.

How to store potatoes properly

1. 1

   Sort before storing

   Soft, bruised, or already-sprouting potatoes go in a separate use-soon pile. One bad potato can rot a whole bag in days.

2. 2

   Don't wash before storing

   Moisture on the skin invites mold. Brush off loose dirt with a dry hand; wash right before cooking, not before storing.

3. 3

   Use a paper bag, mesh bag, or burlap sack

   Plastic traps moisture and ethylene gas. Paper and mesh breathe. The original bag from the grocery store is often fine if it's paper or mesh.

4. 4

   Pick a cool, dark, ventilated spot

   Lower cabinet away from the oven and dishwasher works well. A basement or unheated mudroom is even better. Skip the windowsill.

5. 5

   Keep them away from onions and apples

   Onions release moisture and apples release ethylene gas. Either one near potatoes speeds sprouting and decay. Different cabinet, different drawer, separate counter.

Freezer: cooked yes, raw no

USDA places raw potatoes at not recommended for freezing. Ice crystals rupture the cell walls, and thawed raw potatoes turn mealy, watery, and gray. Some commercial frozen potatoes (fries, hash browns, tots) work because they were par-cooked before freezing.

Cooked potatoes freeze well at 0°F (-18°C). Food held steadily at 0°F (-18°C) stays safe indefinitely; any timeline is about quality, not safety, and how soon a frozen potato dish drops in quality depends on the dish and how well it's wrapped. As a general benchmark, USDA puts frozen cooked leftovers at about 3 to 4 months for best quality, with smoother dishes holding up better than crisp or watery ones:

• Mashed: holds quality longest, smooth dishes freeze and thaw best
• Baked then mashed: same
• Roasted or boiled: shorter window, the texture suffers more on thawing
• Blanched fries: par-cook 3-5 minutes in oil first, then freeze flat

Sweet potatoes follow the same rule: cook first, then freeze.

Cooked potatoes in the fridge

Once cooked, potatoes follow normal leftover rules:

• 3 to 4 days at 40°F (4°C) or below in an airtight container
• Cool to room temperature within 2 hours of cooking (USDA's two-hour rule)
• Reheat to 165°F (74°C) internal

One specific risk: cooked rice gets the Bacillus cereus warning, and cooked potatoes carry the same risk if held at room temperature for hours. Bacillus cereus spores survive cooking and can grow on warm starchy food. Refrigerate cooked potatoes inside the 2-hour window.

Most-missed steps

• Storing in the refrigerator. Starch-to-sugar conversion gives sweet, dark-browning potatoes. The pantry is the right home.
• Washing before storing. Surface moisture is what mold needs. Brush dirt off dry.
• Plastic bag in the cabinet. No airflow → condensation → rot. Switch to paper or mesh.
• Storing next to onions or apples. Ethylene and moisture speed sprouting. Separate them.
• Eating extensively green or bitter potatoes. Solanine doesn't cook out. Cut small green spots; discard heavily greened.

Where it lands

One to two months in a cool dark pantry, one to two weeks on the counter, three to four days for cooked. The fridge belongs to cooked potatoes only, raw ones store better at root-cellar temps. Green spots can be cut away with a quarter-inch margin; heavily greened or bitter potatoes go in the bin. Cooked freezes well; raw doesn't.