I moved my bulbs early this spring as soon as I could tell what they were. I planted them in the fall and some hyacinths got mixed in with daffs, etc. Except for the bulbs I accidently cut with the trowel, they all came up and mostly bloomed. There were only one or two that looked like they were mature enough to bloom and didn't so I think it was a success. I guess if you move them early enough before the roots get too long, it works. I live in PA in zone 6.