If you prefer a more rustic and natural look, consider using stone walls as courtyard garden dividers. Stone walls add a timeless charm to any outdoor space and can be built in various heights and styles to suit your preferences. Pair the stone walls with ornamental grasses like Calamagrostis or Hakonechloa for a soft and romantic feel. The grasses will cascade over the stone walls, creating a beautiful and organic look. Additionally, the stone walls can also serve as a seating area or a backdrop for a water feature, enhancing the overall ambiance of your courtyard garden.