This season I grew and stored 5 “legs” of onions the first week of September. I used the last of them the first week of January. That means I used only home-grown onions for 4 months!
The method of tying them in nylon stockings really worked–only about 2 sprouted and 2 went bad. But those were not able to infect the other onions, so I feel like I maximized my harvest.