I agree, both with letting the foliage die back and/ or moving as a clump. Maybe it's because I am in a warmer climate, but I never hold my bulbs out of the ground for any length of time. I just decide where I want to move them to and do it. I do try to let the foliage die back when possible, but if I can't or don't want to wait, I just dig up the whole clump. I don't grow anything that requires a winter chill.
