How Long Do Potatoes Last?

How long do raw potatoes last in the pantry?

Raw potatoes last 1-2 months in a cool, dark pantry when stored properly. Optimal storage temperature is 45-50 degrees F, which is cooler than typical room temperature but warmer than refrigerator temperature. A cool basement, root cellar, or unheated garage works ideally; standard kitchen pantries are usually warmer (around 65-72 degrees F) and shorten shelf life to about 1 month. Store potatoes in a paper bag, mesh bag, or basket that allows air circulation; plastic bags trap moisture and accelerate rotting. Keep them away from light (which triggers greening and solanine production), separate from onions (which release gases that accelerate potato sprouting), and in a single layer if possible to prevent bruising.

How long do potatoes last in the fridge?

Raw potatoes last 3-4 months in the refrigerator, longer than pantry storage. However, refrigeration changes potato chemistry: the cold temperature converts some starches into sugars, which can make potatoes taste sweeter and brown faster during cooking. Some food safety guidance has historically warned against refrigerating raw potatoes due to acrylamide formation when refrigerated potatoes are cooked at high heat, though current research from the UK Food Standards Agency suggests this concern was overstated. For practical purposes, refrigeration works for long-term storage; just expect slightly different cooking results. Cooked potatoes (mashed, roasted, baked, boiled) last 3-4 days in the refrigerator regardless of how they were prepared. Store in airtight containers.

How do you tell if potatoes have gone bad?

Spoiled potatoes show several warning signs. The texture becomes soft, mushy, or wrinkled rather than firm; soft spots that indent when pressed signal the potato should be discarded or trimmed (small soft spots can be cut away if the rest is firm). A foul, musty, or moldy smell indicates rot, often hidden inside an apparently normal-looking potato. Black or brown discoloration inside (when cut open) signals decay. Greenish patches on the skin indicate solanine production (the same compound found in nightshade berries); small green areas can be trimmed away, but heavily green potatoes should be discarded since solanine causes nausea and stomach pain in large amounts. Excessive sprouting beyond small eyes signals the potato is past prime.

Can you eat sprouted potatoes?

Yes, sprouted potatoes are safe to eat if the potato itself is still firm and otherwise looks normal. Cut off the sprouts and any green spots before cooking; the sprouts contain higher levels of solanine, the natural compound that makes nightshade plants mildly toxic in large quantities. Small sprouts (1/2 inch or less) on otherwise firm potatoes are fine after trimming. Long sprouts (several inches) signal the potato is past prime; the potato is using its stored energy to grow sprouts and the flesh becomes drier and less flavorful. Heavily sprouted, soft, or shriveled potatoes should be discarded; the increased solanine content combined with degraded flesh isn't worth the food poisoning risk for an inexpensive ingredient.