Flower bulbs are some of the most rewarding plants to grow in the garden. Whether a professional or beginning gardener, bulbs offer a high success rate—and provide the garden with valuable foliage and color. Some bulbs also produce excellent flowers for cut-flower displays. When planting bulbs in the garden or a container, the most important thing is to make sure there is good drainage. Bulbs that sit in water are prone to rot. Depending on the variety, flower bulbs may be planted in the spring or the fall. When selecting bulbs for sale, consider their light requirements, plant height, bloom time, hardiness zone, planting time and flower color.