Sweet William has been a favorite in the flower border for generations. They are relatives of the carnation, and flower in shades of red, pink and white. Many forms, such as the 'Wee Willie' shown at left, are bicolors. They are easy to care for, and form neat mounds that seldom need pruning. These plants grow best in cool areas and are not suitable for tropical zones. Sweet Williams make excellent cut flowers and will last long if the water is changed regularly. Choose a location that receives full sun. Plants need well-drained, alkaline soil. Most gardners will need to adjust the pH of the soil by adding lime. Transplants should be set out in late summer or early spring. Place them four to six inches apart and keep them well-watered but not soggy until they are established. They will benefit from a monthly feeding. They don't handle the summer heat well, and the plants can be discarded when they are no longer attractive.