The tops are the way the

The tops are the way the onion grows and also how you can tell when it's mature and ready to be harvested.

When the tops begin to dry and fall over in the fall, you know the onion can be lifted out of the ground. Let them dry out for several days.

After the drying, clip the tops and remove the roots, leaving about 3/4 to 1 inch of the neck to seal and prevent entrance of decay organisms.