1、 Before germination

At the beginning of germination and expansion in early spring, some quick acting nitrogen fertilizer can be applied. Just apply the fertilizer near the root. The root can be absorbed, which can promote the newly grown shoots to become strong and improve the yield. At this time, fertilization is very critical

2、 Before flowering

Fertilizer can be applied two weeks before flowering. At this stage, it is mainly applied outside the root. After preparing chemicals, spray them on the leaf surface. The main fertilizer is boron fertilizer, and some microbial sweeteners can be selected. At this time, the effect of fertilization is still significant, which can improve the progress of photosynthesis and the transformation of substances. It has a good effect on late flowering, insemination and fruit setting

3、 Young fruit stage

After the flower withers and the young fruit just begins to expand, it can be topdressing, mainly nitrogen fertilizer, or a combination of potassium fertilizer and phosphorus fertilizer. The fertilization method should be combined with ploughing. First dig the soil deeply, and then bury the fertilizer in a small hole about 30-50 cm away from the plant

4、 Berry maturity

When the fruit begins to color, it is also an important fertilization period. It is mainly to apply fertilizer containing potassium and calcium. Fertilization methods should not only be applied at the root, but also sprayed on the leaves