Pruning is to adjust the relationship between the growth and fruit of potted grapes according to the biological characteristics of grapes and the specific situation of the plant itself on the premise of maintaining the original tree shape, so as to achieve the purpose of uniformity and good fruit and improve the ornamental value.

1. When budding plants germinate, select robust and fruiting new buds and wipe off unnecessary buds. The sooner you wipe the bud, the better. Because the germination time is inconsistent, it is often necessary to wipe the buds 3 ~ 4 times. Don't leave many branches in potted grapes, it depends on the size of pots and trees. Generally, 2-year-old potted grapes have 3-5 new shoots per plant, and 4-6 new shoots over 3 years old, and they are cultivated into fruiting branches.

2. Nucleation forces the new shoots of plants to stop growing temporarily, which is beneficial to the generation of secondary branches and flower bud differentiation. For developing branches without inflorescences, the core should be picked when they reach the required length of the tree. For fruiting branches, when they grow to 4 ~ 6 leaves, they should be topped; For secondary branches (one main branch leaves 1 ~ 2 secondary branches), when it grows to 3 ~ 5 leaves, pick the core.

3. Potted grapes with sparse flowers and fruits are generally large fruit varieties, and only 1 inflorescence is left in each flowering and fruiting branch; For small fruit varieties, two inflorescences are reserved for the strong branches, 1 for the middle branches and no for the weak branches. Generally, there are about 300 flowers in each inflorescence, but some flowers or young fruits will fall off or develop into worthless fruit particles, and only 30% ~ 50% of them really develop into mature fruit particles. Before flowering, the flowers can be thinned by 50% ~ 60%, and the method of head-to-tail can be adopted to make the remaining flowers evenly distributed on the inflorescence and improve the fruit setting rate; Or manually arrange inflorescences to make them smaller, thinner and more orderly, so as to result in compact and beautiful ear development.

Before and after the fruit enters the expansion stage, the fruit grains that are too dense, too large, too small and deformed become thinner. Large-grain varieties can keep 40 ~ 50 grains per panicle, and small-grain varieties can keep 50 ~ 70 grains per panicle.

4. Under natural conditions, grape plants climb by tendrils. When potted, because branches and vines are bound manually, tendrils can be removed as soon as possible and the consumption of nutrients can be reduced. The binding of branches and vines should strive to make them evenly distributed on the support, without shielding each other, and the configuration is beautiful.