Purchase autumn-blooming daffodils from a mail order catalog or online; these varieties are not typically sold in stores. Place your order in the spring, as bulbs should be planted in the summer, six to eight weeks before frost. Autumn and winter flowering daffodils include N.(Narcissus) canariensis, N. cavanillesii, N. elegans, N. miniatus, N. papyraceus, N. serotinus and N. viridiflorus.
Dig a hole 4 to 6 inches deep. Bulbs should be spaced4 to 5 inches from each other, so determine the width of the hole based on how many plants you want in that area. Several bulbs may be placed in a single hole, so long as they maintain the correct amount of spacing. For mass planting, a bulb planter, which removes a core of soil and leaves a bulb-sized hole, may be more efficient than digging large holes.
Mix bone meal into the soil at the bottom of the hole, at a rate of 1 cup per 5 square feet of planting area, as well as a balanced, or complete fertilizer, applied at the manufacturer's recommended rate. Place bulbs in the hole, 4 to 5 inches apart, with the tips pointing upwards. Cover the bulbs with soil to the original level.
Keep moist during the first two weeks to help bulbs develop roots. Fertilize with a bulb fertilizer twice yearly at the recommended rate: once in the late summer or early fall, when new foliage emerges, and once again after the flowers fade. Avoid fertilizing while the plant is in its flowering cycle. Remove old foliage only after it turns yellow, as it is supplying the bulb with energy for next year.