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I planted a plum tree in 2009. I want to trim it this spring. How should I trim it?
Pruning methods of plum trees include winter pruning and summer pruning.

Pruning in summer: From June to August, as long as you feel dense, you can cut some branchlets from the branches, which can be bare, but don't cut off the fruiting branches, otherwise you won't be able to eat the fruits.

Winter pruning: mainly short pruning, that is, cutting off some branches from the top. 1? Or half 1? The purpose is to promote the growth of fruit trees, reduce fruit, and cut off some fruit branches, because the fruit of fruit trees is causal, and more fruits will become smaller. ?

Pruning purpose: Pruning is mainly to cut off long branches, drooping branches, back branches, over-dense branches, diseased branches and weak branches. Pruning can control the yield of fruit trees and improve fruit quality. It is for fruit tree modeling: pear tree is in the shape of three main branches, peach is in the shape of three main branches, and pomegranate is in the shape of natural round head.

Re-pruning of fruit trees in spring is the supplement and perfection of winter pruning, which is generally carried out when the flower buds can be clearly identified after the fruit trees germinate, and it is best to finish it before the flower buds unfold. In spring, fruit trees should be cut into young trees, weak trees or early flowering varieties, and then cut into young trees, prosperous trees and late flowering varieties. In addition, the replanting of fruit trees in spring depends on the variety, age and potential of trees. Secondly, it is necessary to put an anti-corrosion film on the trimming mouth to prevent water evaporation and nutrient consumption.

For the big trees in full fruit, we should choose to keep full and leafy flower buds and remove the thin and thin flower buds with few leaves. The ratio of growing branches to fruiting branches is 3: 1, which makes the load more reasonable. For large trees with large flowers, it is necessary to properly remove weak branches and weak buds, leave more strong branches and strong buds, and renew old dense branches. For young trees with few flower buds, leave more flower buds and remove too dense vegetative branches; Winter scissors should cooperate with cleaning the garden. In addition to taking the sick branches out of the garden and burning them centrally, the whole garden should be disinfected by general spray to protect the trees from overwintering safely.