Daffodils not blooming

[judidiff]

I've planted two different varieties of daffodils in two different locations... one with full sun, and one with mostly shade. Only a few of the bulbs in the full sun location have bloomed; none of those in the shade have. They all have leaves, but there is no sign of even a bud on those that haven't bloomed. Can anyone tell me what might be happening?

[KimmSr]

When were these planted?
This web site, http://www.bulb.com/ will provide you with all the information about spring flowering bulbs you will ever want.