1. Pruning of garden trees can be divided into winter pruning and summer pruning. Winter pruning is also called dormant pruning (usually from 65438+February to February of the following year). It is best to plant trees with poor cold tolerance in early spring to avoid cold wounds. Deciduous trees generally shed their leaves in winter and germinate in the next spring. Pruning in winter has great influence on crown formation, new shoot growth and flower and fruit branch formation of ornamental trees.

2. Summer pruning is also called growth pruning (generally from April to 10), which is carried out from bud germination to defoliation, that is, before new buds stop growing. The specific pruning date should also be different according to the local climatic conditions and tree species characteristics. For example, when pruning flowering fruit trees, it is necessary to cut off inner branches, upright branches, useless branches, excessively dense cross branches, weak drooping branches, pests and diseases, etc. , so that nutrition is concentrated on the backbone branches, which is conducive to flowering and fruiting. Hedge pruning in summer mainly keeps it clean and beautiful. Other garden trees should be trimmed into different shapes according to functional requirements;

3. Pruning method; Thinning refers to cutting branches from the base. Sparing and deleting can remove pests and diseases, dead branches, useless branches, too dense cross branches and branches that conflict with municipal facilities. Dewatering can improve ventilation and light transmission conditions, increase photosynthetic efficiency of leaves, increase nutrient accumulation, and be beneficial to growth and flower bud differentiation;

4, short cut, the pruning method of removing some annual branches is called short cut. Short cutting can stimulate the germination of lateral buds under the incision;

5. Shrinkage cutting is to cut off the branches of perennial branches, which can reduce the dominant position of the top and promote the renewal and rejuvenation of perennial bases.