Answer: Daffodil bulbs are very longlived, but most varieties need to be divided and replanted when they become crowded. Failure to do this can result in foliage without blooms. Another cause for foliage without blooms is removing the foliage while it is still green instead of allowing it to grow, replenish the bulbs, and then die back naturally. In your case, I suspect they need to be lifted and divided. You can do after the foliage has faded later this spring or you can dig and divide your bulbs this fall.
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