There isn’t a more rewarding garden flower than the herbaceous Peony. These perennial flowers range from exquisitely delicate singles to large and lush doubles, with shades from pure white to the deepest red. They produce their display in early June, regardless of weather. Peonies like full sun and neutral to slightly sweet soil and shrug off cold. Their glossy, deep green leaves look good all season, and Peonies make superior cut flowers, lasting more than a week if cut in full bud.