Detailed Explanation of Winter Pruning Techniques and Methods for Flowering Trees and Shrubs

    Pruning is an important part of garden management and maintenance work. As the saying goes, "seven parts management, three parts pruning." Winter pruning is even more important, and here it refers to pruning during the dormant period. The time frame runs from the end of autumn, when branches stop growing, until early spring of the following year, before the terminal buds sprout.
　　
Because the trees are in the dormant period, pruning at this time causes less damage to them and helps protect them. Pruning should vary according to the tree species and be handled differently in each case. For flowering trees and shrubs, any that bloom in spring should be pruned moderately: only remove the autumn shoots that bear no flower buds, and do not prune heavily, so as not to affect the following year's bloom. Any flowering trees and shrubs that bloom on the current year's branches, such as China rose (Rosa chinensis) and Chinese hibiscus (Hibiscus rosa-sinensis), should be pruned heavily so that they bloom and fruit more the following year. For deciduous flowering trees and shrubs, take care not to prune before leaf fall. Prune after leaf fall to avoid excessive loss of nutrients and, by doing so, to effectively prevent infection of the pruning wounds.
　　
Winter pruning also requires attention to temperature. In severely cold weather it is not easy to prune, lest the tree wounds be damaged by freezing. It can be done in early spring when the weather warms up and before the root system enters vigorous activity. Winter pruning should be carried out according to factors such as the characteristics of the tree and the weather conditions, so as to achieve the goals of shaping, promoting growth, overwintering and pest prevention. In winter pruning, also take care not to injure the parts close to the main trunk, and do not leave the stubs of side branches too long, so as to promote early healing of the wounds. Saw cuts should be smooth to avoid tearing the bark. Also apply a protective agent to the saw cuts, such as lime or paint. When pruning, also note that the top lateral bud should be left on the outer side of the branch, so as to keep the tree form growing outward.