1、 Reasons for flowering failure of Forsythia suspensa

1. The rate of self pollination is low

Forsythia only blooms and does not bear fruit, which is likely to be caused by self pollination. The fruiting rate of self pollination itself is relatively low, which is basically maintained at about 4%. Especially those planted at home, it is difficult to cross pollinate, so the fruit rate is generally very low

2. Overgrowth of scattered nutrients

During the maintenance period, there is no pruning treatment, and there are too many bare branches, especially in spring. If not pruned, the bare branches will disperse a lot of nutrients, resulting in the absorption of nutrients from the main branches and the excessive dispersion of nutrients, which will lead to the reduction of fruiting rate

2、 Treatment of flowering and fruiting failure of Forsythia suspensa

1. Promote cross pollination: when planting, the plants with long style and short style should be cultivated alternately, which can promote cross pollination and help it pollinate better, so as to improve the fruit setting rate

2. Reasonable pruning: pruning shall be carried out in time during management. When the plant is about 1m high, the main shoot should be trimmed in winter and the heart should be picked in summer to promote more branches. It is usually found that bare branches, sick and weak branches and withered and old branches should also be pruned to save nutrients and make nutrients more concentrated, which can also improve its fruit setting rate

3. Rational fertilization: after pruning, it is necessary to top fertilize the rotten manure, or dig pits and apply it around the plant in combination with phosphorus and potassium fertilizer, so that the plant will be healthier, promote more flowering and bear fruit