Depending upon your climate, many--or even most!--perennial flowers will be able to handle full sun. Peonies, daylilies and iris are popular for larger, grouped plantings. Lower-lying plants, such as phlox, sedums, and dwarf daylilies, work well in the fronts of beds and borders. No matter your location, you have plenty of options to create a bright and beautiful garden with perennials that don't merely tolerate the sun--they thrive in it!