Stone walls are a classic and timeless choice for courtyard garden dividers with ornamental grasses. They provide a strong and durable barrier that can withstand the test of time. Stone walls can be built at different heights and thicknesses, depending on the desired level of privacy and enclosure. Ornamental grasses can be planted along the base of the walls, softening their appearance and adding a touch of nature to the space. Stone walls also create a sense of permanence and elegance in the courtyard, making them a popular choice for both traditional and contemporary garden designs.