The number of tulip varieties available today is limitless. They range in size from 4-6 in. tall (Rock Garden Tulips) to 12 in. tall (Mayflowering, Triumph or Emperor Tulips). The flowers are available in every color imaginable, as well as solids, stripes and bicolors. Plant in full sun, well-drained soil and water twice-a-week while blooming. Feed these bulbs annually in fall with bone meal fertilizer. These bulbs are much sought after as a food source by small mammals; protect accordingly.