Around here (Ohio) we dig up the bulbs every few years, discard the
small bulbs, and replant the large bulbs. This is done after the
foliage dies down, and there will be blooms the following spring.

I've heard many explanations of why we do this, and the only one that
makes sense to me is overcrowding. Regardless of the lack of
explanation, I know it does work.

helco wrote:
I have some clumps of daffodils that don't bloom or else bloom very
sparsely. Some have buds that die off. I've tried giving them bone meal
after bloom (or nonbloom), but it hasn't helped. Other daffodils in my yard
bloom profusely. I am about to dig up the non-bloomers. Question: Should
I try replanting them elsewhere, with nice compost in the holes etc., or
should I let them do their bit by tossing them into the compost pile?

heclo
East central Illinois