Like other plants, narcissus bulbs need food. Bonemeal used to be the recommended fertilizer, but no more: it lacks the nitrogen that promotes healthy foliage. Special bulb fertilizers are much better; look for a 10-10-20 formulation with controlled-release nitrogen. Mix fertilizer into the soil at planting time. In subsequent years, sprinkle bulb fertilizer over the bulb bed each fall at the rate specified on the bag, then scratch or water it in.