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How Long Do Potatoes Last? How long do potatoes last? Potatoes last about 3-5 weeks in the pantry and 3-4 months in the refrigerator. The shelf life of potatoes depends on a variety of factors such as the sell by date, the preparation method, the type of potato, how the potatoes were stored and the humidity of your climate.
Purple sweet potatoes have a rich, almost winey flavor but are denser and drier than regular sweet potatoes. When cooking, they will take longer than regular sweet potatoes. It will take anywhere from 90 minutes to 2 hours at 350 F to make them pleasingly moist.