Juvenile refers to the period from survival after colonization to flowering and fruiting, usually 3-4 years. The main task of this stage is to cultivate the tree skeleton and lay a good foundation for high yield in the future. The principle of pruning young trees is light pruning, less thinning and more branches. The greater the amount of branches and leaves, the more organic nutrients are produced, the faster the formation and the earlier the fruiting period. To this end, the following pruning measures are mainly taken.

The extension branches of the main branches are cut off in the short and medium sections to promote the growth of long branches and expand the crown. In order to spread the crown quickly, the young trees have many branches and leaves. When pruning during dormancy, it is advisable to adopt the method of medium and short pruning, and the cut buds are left on the full outer buds to facilitate branching in appropriate parts. Sweet cherry has the characteristics of strong polarity, strong germination ability and strong branching ability. After short cutting in the middle, 3-5 long branches keep growing under the incision, forming so-called three branches, four branches and five branches, and most of the others are short branches or leafy branches, which makes the periphery crowded and the middle and lower parts empty. Therefore, these long branches under scissors should be handled according to the situation. Except for the extended branches of the main side branches, the upright branches are twisted or continuously and seriously cored to form small fruiting branches, which can be thinned when a large number of fruits are weak or there is no space. This not only solves the problem of too dense peripheral branches, but also cultivates fruit-bearing branches and makes young trees bear fruit early. Other branches that grow horizontally and obliquely are cultivated into various fruiting branches by different degrees of pinching or light and short cuttings.

Generally, weak branches tend to grow slowly, with few branches and easy uniaxial elongation, which not only hinders the growth of other branches, but also tends to weaken and die. Therefore, small fruit branches should be cultivated by pruning to prolong their life and give full play to their production potential. The first is young and short branches, the first is medium and long branches, and the rest are foliage branches; In the second year, the middle and long branches at the top are cut short, generally only one long branch or middle branch is issued, and the rest are short branches; In the third year, only short and medium branches are cut, and the rest branches are slowly released to promote their early fruits.