I have never had any red ones keep as long as the white ones so I grow Red Norland and use them first and then the Kennebec which seem to be my best white keepers.
Storage conditions are important. All of my potatoes are kept in 1/2 bushel baskets in my cool, dark, basement up off of the concrete floor.
I do usually have to pick off small sprouts at least one time during the storage process. I keep my eye on them and when I see sprouts starting I pick them all off and then it is time to start using up all of the potatoes within about a month.
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