The choice of plants for roof green

The choice of plants for roof greening of large underground buildings is more extensive than that of general roof greening. In the past, due to the influence of many factors, the roof greening of large underground buildings was treated the same as ordinary roof greening, resulting in single plant species, poor level, and poor ecological effects. The roofs of large underground buildings are closer to the natural factors on the ground, such as climate, light, temperature, wind, etc., so there is a wider selection of plants. Three types of plants, namely, trees, shrubs and herbs, can be used. The four-season landscape with unique plants, reasonable planning of activity areas, equipment locations and transportation routes create a clear and well-organized green landscape for primary and secondary schools. The principles of plant collocation can be summarized as follows: (1) The theme is prominent and the levels are distinct. Highlight the theme of the landscape and give full play to the natural beauty of plant shapes, lines and colors. Large trees are matched with small trees, shrubs, and herbs. The primary and secondary ecological landscapes are distinct and rich in layers. (2) Pay attention to the construction of plant space function. Plant spaces can be divided into open, semi-open and closed. According to different terrain conditions, different groups design different spatial forms. (3) Pay attention to plant growth habits and seasonal changes. Plant selection should try to choose native plants suitable for the local climate, while taking into account the diversity and ornamental nature. To highlight the landscape of one season, the other three seasons should be taken into consideration to form flowers, leaves, fruits, and shapes to create landscape effects in different seasons.