Pruning and shaping of Magnolia grandiflora: Magnolia grandiflora has few branches and generally does not need pruning. However, if there are no seeds for ornamental purposes, the stems can be cut off after the flowers wither, so as not to waste nutrients in the body. In addition, when trees are aging and flowers are scarce, they can be rejuvenated by pruning. The specific method is to cut off the branches with poor growth from the base when the leaves just germinate, and then open a circle of ditches on the ground with equal distance around the crown to facilitate fertilization and watering and promote the germination of new branches. If there are too many new branches, they can be pruned, and the best ones can be kept for about 2 ~ 3 years, and they can bloom normally. The healing ability of magnolia branches is poor, so it is generally advisable to prune less or not. However, in order to cultivate a reasonable tree shape, we should pay attention to the reasonable layout of the trunk and main branches at the seedling stage. For big trees, the branches that are overgrown, withered, damaged by diseases and insect pests, branched inward and crossed should be thinned to concentrate nutrients and promote more flowers. Plastic pruning should be done after the flowers wither and before the leaves unfold. If there are no seeds left, cut off the residual flowers.