To harvest onions, leave the onions in the ground for 10 days after the tops flop over, and then pull the onions out of the ground by grabbing the top as close to the neck as possible. Let the onions cure before storing.Continue Reading
Onions are ready to harvest shortly after 80 to 90 percent of the tops have fallen over. Push over any tops that remain standing. At this point, the onions stop growing, and the leaves become weak and lose their color. Allow the onions to mature in the ground for another 10 to 14 days. After two weeks, the onions become susceptible to organisms that cause rot. On a sunny day, pull the onions out of the ground by grabbing the top as close to the neck as possible.
Leave the onions outside to dry for a day or two. After the initial drying process, put the onions in a warm, well-ventilated and shady area. Allow the onions to cure for two to three weeks. During the curing process, turn the onions several times to promote even drying.
After curing, store the onions in a mesh bag in your garage or in a root cellar.