Answer: It's possible that you are storing your onions in too warm a place. To harvest and cure onions properly, wait until 75% of the tops have fallen over naturally before harvesting the crop. Store them in a dry, shady place with good ventilation, such as an outdoor shed or barn, for 10 days to two weeks. After the onions have cured, put them in slatted crates or mesh bags. Store them indoors in a cellar with low humidity and temperatures between 33F and 45F.
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