Place bulbs shoulder to shoulder across the surface of the soil, leaving no space between them. Then top off with more potting soil so the bulbs are just slightly below the surface. Water each container thoroughly, and finish with a layer of mulch.
Spring containers: Fill containers with layers of yellow daffodils, fragrant purple hyacinth and perky crocus and let rest all winter long before sunny days wake up the bulbs in early spring. Read more at The Home Depot's Garden Club.