The Knock Out variety of roses lets gardeners of any skill level (and soil type) enjoy dazzling blooms. Knock Out roses can be planted individually, or as a colorful hedge. They bloom all summer long and well into fall with no special care. While they will perform best if pruned after the last frost, they’ll come back year after year, even if you don’t. If you do decide to cut them back for shaping purposes, do it any way you like—the plant won't mind! Available at Burpee.com; $18.95 for one plant.