racoonsdoeatbeans said:...bend over onions tops horizontally after the leaves begin to brown...
I want to know what's the best procedure for my onion crop.
Onions can be harvested for immediate use at any stage, but for best storage let the onion mature in its own time.
The onions will let you know when they are ready. The tops will lose color, the neck will dry out and the tops will naturally fall over. Bending the tops over too early will not help the onion to be ready to harvest for storage.
After pulling the onions, yes, leave the tops intact as the drying and curing procedure takes place. Once the onions are dried and cured (and assuming a storing variety has been grown), cut the tops away about 2 inches from the bulb, snip off the dried roots and the onions should store very well.
Here is one of the articles about onions: