Non Flowering Daffodils.
Non flowering daffodils in the spring are normal caused by one of two reasons.The first being if the daffodils have been cut back to early the previous year which would not have allowed enough time for the flowers to reform in the centre of the bulb for next years flowers.The other reason is that after about 7 to 10 years the bulbs are best dug up and divided to encourage flowering.The best way to do this is to mark the bulbs in the spring with some canes and then in June dig them up and divide them and replant.