Cheryl ~ multiplier onions are perennial here. They can stay in ground year around. The tops will die down in early summer (May for me). You can harvest the bulbs and save them to replant or you can leave them in the ground and in fall (Oct) they will begin to sprout and grow again. If left in the ground, they will turn into a clump of smaller onion bulbs. Mine are about the size of a quarter. They are known as multipliers, bunching onions or potato onions.
You can eat the onion tops and the bulbs but these will never make larger bulbs like Canadanna was looking for when she began this thread.
