Millions of small bolls grow fast and are resistant to pruning, so they should be pruned frequently during cultivation and maintenance. Kernel should be removed in time at seedling stage, so that its height can be controlled, nutrients will be more concentrated, more lateral branches will grow, and plant types will be fuller and more beautiful. During the growth period, dry and yellow branches and leaves should be cut off in time to reduce nutrient consumption. Cut it again after winter, trim the weak branches and long branches, and only keep the strong branches and leaves.