Stone walls are a classic choice for courtyard garden dividers. They provide a timeless and sophisticated look to the space while also offering functionality. Stone walls can be built using various types of stones, such as limestone, granite, or slate, depending on the desired aesthetic. The natural texture and color variations of the stones create a visually interesting backdrop for ornamental grasses. Stone walls can be designed to blend seamlessly with the overall garden design, adding a sense of permanence and structure. With their durability and low maintenance requirements, stone walls are an excellent choice for dividing your courtyard garden.