Starting now, you can harvest what you’ll eat
If you planted long-day onions this spring, you will notice that they are forming bulbs. If you accidentally planted short-day onions, you will be feasting on onion tails for the rest of summer. Right now, both long-day onions such as Copra and First Edition and day-neutral onions like Candy are producing nice large bulbs. You can start harvesting them now, but since they are not mature, they won’t store well. Harvest only what you can eat.