The foliage on spring flowering bulbs should be allowed to die back naturally to feed the bulbs for the next season. Tulip bulbs generally don't do so well year on year, but are one of the bulbs that may be dug up, dried and so red in a dark cool airy place (shed, cellar...) and replanted. They can be stored in old onion nets, tights or similar. Narcissi (daffs) generally do best if kept in a growing medium. You could plant shallow rooted annuals on top of the bulbs in the pots when the dying foliage gives space. And feeding the bulbs ( in their pots still) may help next year's display as well.
