Top-grade roof greenery layout plan

Quick answer：

Roof greenery, also known as rooftop gardening or green roof, refers to the practice of creating vegetation on the roof of buildings. A 'top-grade roof greenery layout plan' would be a detailed design for such a project, outlining the types of plants, irrigation systems, and structural considerations required for a high-quality green roof. This can include factors such as water conservation, soil depth, plant selection, and integration with the building's structure.