Flower bulbs are easy to grow and add color to the garden. Many also make excellent cut flowers for bouquets and fresh floral arrangements. Depending on the variety, flower bulbs may be planted in the spring or in the fall. Usually, fall-planted flower bulbs, like tulips and daffodils, bloom in the spring, while spring-planted bulbs, such as cannas and gladiolus, bloom in the summer. Some bulbs are winter hardy and can stay in the ground over winter while others are tender bulbs and must be dug up or lifted in the fall. All bulbs like well-drained soil. However, their other growing conditions may vary. When selecting flower bulbs to buy online, consider whether they grow best in full sun or in shaded conditions, plant height, bloom time and their hardiness zones.