Like most perennials, daffodils (Narcissus) grow and spread, forming larger colonies each year. If not divided regularly, the bulbs become too crowded to bloom well. Luckily, there is an easy fix-dig your daffodils in summer or early autumn and plant the bulbs farther apart so they're no longer crowded. Pull individual daughter bulbs from the mother bulb and replant each one in its own hole. I find it helpful to mark where the bulbs are while they?re in bloom, so I don?t forget where they are after they go dormant.