Question: My onions have grown well. How can I tell when it’s time to harvest them?
Answer: Harvest bulbing onions once two-thirds of their tops have fallen to the ground. Dig the bulbs and lay them out on top of the ground to dry for a couple of days. Lay their foliage over their tops to prevent sunscald. Don’t water them for a few days prior to harvest, and move them into the garage if there is threat of rain. Moisture promotes decay during storage. Store them cool and absolutely dry.