Pruning and shaping of elm bonsai: Elm bonsai has strong germination and fast growth, so it should be pruned frequently to maintain the beauty of the tree shape and increase the light transmittance of the plant. In addition to heat dissipation through water evaporation, the function of regulating heat dissipation by evaporation of plant leaves is also very important. Therefore, the branches and leaves of elm must not be pruned on a large scale in summer, so as not to destroy its normal regulating function, which will lead to the water in the basin soil not being volatilized and the root system suffocating and rotting. Elm has strong germination and rapid growth. In the growing season, you should always prune and keep the tree shape. When the new branches grow to 4 ~ 6 cm, they should be trimmed once according to the needs of modeling. The best viewing period of elm bonsai is when New Ye Gang comes out. If all the leaves are removed in early autumn, and then the decomposed organic liquid fertilizer is applied again to strengthen management, this will increase the best viewing period.