What evergreen plants are suitable for roof gardens?

General principle: Choose plants with short plants and shallow roots, and plants with high trees and deep roots. The wind-driven soil layer on the roof is too thin to be blown down by the wind. If the soil layer is thickened and the weight is increased, the roots of trees are developed, and the waterproof layer will be deeply tied, resulting in roof leakage. In gardens, plants with relatively low roots, drought tolerance, cold tolerance and barren tolerance should be selected. The main landscape types are: Sedum sarmentosum, Sedum sarmentosum, concave leaf view, golden leaf view and other vines: lianas, Youjute and other perennial flowers. Short-flowered shrubs such as Coreopsis, Dioscorea, Aster, etc. Ziwei, Xuezhong, Malva, Hibiscus, Euonymus fortunei, Fusang, Pseudoforsythia, etc. : white orchid, rose, snow, pomegranate, red maple, bamboo, osmanthus fragrans, octagonal gold plate, gardenia, Hypericum, hydrangea.

Roof garden has stronger wind force, thinner soil layer, small temperature difference between day and night, low humidity and less water. Choose flowers, trees, shrubs, bonsai and lawn plants that are light-loving, wind-resistant, cold-resistant, heat-resistant, drought-resistant, ridge-resistant, strong in vitality and can adapt to the requirements of shallow soil layers. Where the load-bearing column load-bearing wall should be planted, try to use trees with high main roots.

Vines: grapes, fireworks, Parthenocissus tricuspidata, wisteria, Lingxiao, Chunteng, honeysuckle, morning glory, etc.

Hedges: boxwood, holly, Berberis, yellow thorn plum, Jane, pearl plum, hibiscus, etc. Pollution-resistant tree species: flowers, mulberry, albizzia albizzia, hibiscus, jasmine, osmanthus, palm, etc.

Flower shrubs: Camellia, Rhododendron, Pyracantha fortunei, Forsythia suspensa, Rose, Yingchun, etc.

Green shrubs: Ficus, Ficus alternifolia, Liriodendron, etc.

Plants: South American cherry, sunflower, Zhu Mei, Pteris, goose down, etc. The roof of Zoysia japonica. Pennisetum, Ophiopogon japonicus, Ye Zhen, etc. Plants with sun and cold tolerance and deep roots should be planted. The principles of roof greening include selecting low shrubs, plants, perennial flowers and vines. Using tall trees to prevent plant roots from piercing the waterproof layer of buildings, plants with developed fibrous roots should be given priority. The specific varieties of plants with strong root penetration should be selected according to the region (climatic conditions). Environmental analysis (specific planting conditions) Relevant standards can be applied in the same area. Compared with the standard range of roof greening plants in Beijing stipulated in the Roof Greening Standard formulated by Beijing Bureau of Landscape Architecture, such as Pinus tabulaeformis, Pinus bungeana, Ginkgo biloba, Begonia Xifu, Buxus buxus, Plum Blossom, White Clover and Brocade, there is no corresponding standard.