1) Generally speaking, pines and cypresses are mostly shaped naturally, and only diseased dead branches can be cut off every year, but some of them are artificially shaped. ? 2) Pay attention to "pruning" in large-scale greening planting. Natural thinning of pine and cypress is slow, and artificial pruning is beneficial to ventilation and light transmission, reducing pests and diseases. When pruning, we should not only consider the influence of pruning on the height growth of trees, but also consider the influence on the thickening growth of trunk according to the cultivation purpose. ? According to the research, the branches and leaves of 1/3 crown can be removed, which has little effect on the height growth and ground diameter growth of conifers.

3) Most single conifers in the garden have dominant branches, which grow slowly. When pruning, attention should be paid to protecting the central leading branches from damage.