Ornamental grasses can transform a landscape and solve many garden challenges. Perennial ornamental grasses are easy to grow and add movement, texture, color and winter interest to gardens. Taller grasses, like pampas grass, can create a calming effect when it sways in the breeze. These tall grasses can also provide privacy screening or make a stunning backdrop for perennials. Shorter grasses are often used to fill in bare areas, line walkways or as accent plants. Many varieties of ornamental grasses can also be grown in containers. Some factors to consider when buying ornamental grasses for sale are their sunlight requirements, mature height and spread, and hardiness zone.