Rooftop open-air garden design refers to the planning and creation of gardens on the upper floors of buildings. This type of garden requires careful consideration of structural support, soil management, irrigation systems, and plant selection to ensure the garden's stability and sustainability. Key aspects include: evaluating the building's structural integrity to support the garden's weight, selecting appropriate plants for the climate and roof conditions, incorporating efficient water management systems, and creating a visually appealing space that blends with the building's architecture.