1. Fertilization in spring and autumn: Spring and autumn are the growth peak seasons of forsythia. In these two seasons, the demand for fertilizer is relatively high. Fertilization should be carried out in time.Generally, compound fertilizer should be applied every 15 to 20 days to promote vigorous growth of plants, which may also promote the formation and growth of flower buds.
2. Fertilization in winter: Although the temperature in winter is relatively low and the growth rate is slow, proper fertilization is also needed.At this time, fertilization is mainly to apply decomposed cake fertilizer, combined with weeding and loosening soil, which can help it survive the winter, but also promote better and more flowering in the coming year.
In summer, the temperature is relatively high, so the fertilizer treatment should be stopped and the application should not be continued.It is difficult for plants to absorb fertilizer at high temperature, and if fertilization is easy to burn roots at this time, it will hinder growth.In addition, it is better to dilute the fertilizer in the other three seasons before applying it, otherwise it is easy to burn the plants.
Do not fertilize forsythia seedlings when transplanting.Because just planted, the plant is in a new environment, has not yet recovered growth, at this time fertilization is easy to cause damage to the root system.If you want to fertilize, you should wait for the seedlings to grow again, at least a week later.When fertilizing, attention should be paid to dilution and application, so that seedlings can absorb more quickly and promote rooting.
