Not the Karl Orff wrote:
I think you can leave them. Tulips live in the same manner.
Not all onions are "multipliers." Many, perhaps most, are biennial and
will produce a flower and seeds the second year. I raise my own leek seed
this way.
Gary Woods AKA K2AHC- PGP key on request, or at
www.albany.net/~gwoods
Zone 5/6 in upstate New York, 1200' elevation. NY WO G