If forsythia suspensa is in the growing period, prune the damaged and diseased branches. When sprouting in spring, we should prune the over-dense buds and cut off all tillers that affect the tree potential. If you are in dormancy, you should cut off dead branches, diseased branches, clustered branches, weak branches and strong branches to preserve nutrients as much as possible and promote better growth and flowering in the coming year. In addition, old plants that have been maintained for many years should be taken back and pruned.

First, how to carry out auxiliary pruning

1. Pruning in growth period: Prune damaged and diseased branches in growth period, leaving strong branches, preserving nutrients and promoting more vigorous growth. When sprouting in spring, prune the tender buds that are too dense and cut off all tillers that affect the tree potential. In addition, the branches should be cut short after flowering to promote the germination of new branches and make the tree fuller.

2, dormancy pruning: dormancy is after autumn and winter leaves, and must be pruned at this time. Cut off the dead, sick, crazy and thin branches and cut the thick branches short. The part with new buds can be left, usually there are three to five new buds on each branch. In addition, if plants have been maintained for many years, they should be taken back and pruned.

Second, how to improve the fruit setting rate

If you want to improve the fruit setting rate of forsythia suspensa, you should pay attention to two aspects. One is to promote cross pollination. If it is self-pollination, the seed setting rate is usually only 4%, and the fruit setting rate of cross-pollination will be higher. It is suggested that the plants with long style and short style should be cultivated separately to promote cross pollination. Second, it is necessary to prune in time, especially to cut off some long and weak branches in time to reduce nutrient consumption and make nutrients more concentrated, which can also improve the fruit setting rate.