In fall, plant bulbs in deep, fertile, well-drained soil in full sun to light shade. Plant 6" apart and 8" deep in groups of 5, 7, 9 or more. Consider planting them under deciduous trees that will not leaf out until after the Narcissus have bloomed. Water during their growth period. After flowers bloom, let the foliage die back naturally. Once the foliage fades, cut it back. Narcissus can be left undisturbed to naturalize for years. To transplant, dig and divide the bulbs after the foliage has turned brown and replant at once. If you cannot plant bulbs immediately, store in a cool, airy place. Height depends on variety. Some species bloom in February, others March-May. Hardy in zones 3-8.