Our "other bulbs" category features some of the lesser known flower bulbs, including oxalis, buttercups and ranunculus. Like our other flower bulbs, these bulbs are easy to grow, feature showy flowers and are also eye-catching cut flowers. For top garden performance, most flower bulbs should be planted in well-drained soil. If planting flower bulbs in pots, make sure the containers offer good drainage. Before planting flower bulbs, check their sunlight requirements and growing zones. While most flower bulbs prefer full sun, defined as six or more hours of direct sunlight daily, others prefer shade, or two or less hours of direct sunlight daily. Other factors to consider when buying flower bulbs for sale are their flower color and bloom time.