We eat a lot of onions.

When most of the onions have fallen over, we knock the others down and let them dry a couple of days, then pull them and leave them on the bed to dry two or three days longer.  Then we put them on wire racks in the wood shed or summer kitchen until the necks are completely dry, after which they are braided and hung up in the summer kitchen until frost threatens.  It never does to forget them, lest the first hard freeze find them still outside.