Perennial ornamental grasses enhance gardens and landscapes—and they can also solve many garden challenges. Noted for adding color, movement and texture to gardens, ornamental grasses are available in an array of colors and sizes. Smaller ornamental grasses are often used as accents or front borders while taller grasses, like graceful pampas grass, are treasured for their calming effect as they sway in the breeze. These versatile perennials are used to fill in bare areas, provide privacy or screening, and add texture along fences and buildings. They can even be grown in containers. When buying ornamental grasses, note their growing requirements, including their grow zone, light requirements and mature height and spread.