The appropriate time to plant narcissus bulbs is in the fall, when the ground temperature is below 60 degrees Fahrenheit and the first hard frost is six to eight weeks away. The planting deadline usually is October in northern states and November in southern states.
Narcissus plants, also known as daffodils, need a granular fertilizer in the fall and a layer of mulch once the ground freezes. Gardeners who miss out on the fall fertilizing period can fertilize in the early spring. Late spring is the appropriate time to deadhead spent blooms and remove plants that have vertical lines in their leaves, which are signs of a virus.