Practically indestructible, daylilies will flower their heads off in almost any sunny spot. They are drought and insect resistant and offer a wide range of colors and bicolors. Daylilies are also available in early-, mid-, and late-season bloomers. For an all-season flower show plant a few of each in yourgarden. Or, select repeat bloomers that flower from spring until fall. These easy-care perennials eventually form large clumps that should be divided every three to four years. Grows in Zones 3-9.