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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.
2. Boil the sweet potatoes for 15 to 20 minutes. Fill a large stockpot with water and boil it over high heat. Add the sweet potatoes and cook until tender. 1  You need to cook the sweet potatoes before you can freeze them, as raw sweet potatoes tend to break down and lose both flavor and nutrients in the freezer.ure the sweet potatoes for 1 to 2 weeks. Keep the roots in a room or other location that reaches between 75 and 80 degrees Fahrenheit (24 and 27 degrees Celsius) with relative humidity of 90 to 95 percent. 1  The sweet potatoes need to cure for at least 7 days, but they can be kept there for as many as 14 days.