When will the vines in Hangzhou sprout?

Grapes germinate from March to April every year.

1. Every year at the end of March and the beginning of April, vines will begin to sprout. At this time, grape farmers must plough and weed for the first time in order to ventilate and absorb rainwater. In addition, the work of eliminating pests and diseases should also start and continue until the end of July. Then the grape leaves and vines also grow, and later they will grow tidbits on the vines.

2. The lowest temperature for grape growth is about 12℃- 15℃, the lowest ground temperature is about 10℃- 13℃, the best temperature for flowering is about 20℃, and the best temperature for fruit expansion is 20℃-30℃. If the temperature difference between day and night is large, the coloring and sugar content are good. After the grapes germinate in spring. If the temperature rises too fast, it will easily lead to the branches growing too fast, which is characterized by insufficient node length and poor fertilization at flowering stage. In case of cold spring, we should pay attention to applying more phosphate fertilizer and high-carbon organic matter and reducing nitrogen fertilizer as much as possible.

3. Grapes must have a certain intensity of light in the normal growth process, but when the light is too strong, especially when the grapes enter the hard core stage, they are more prone to sunburn. At this time, you can use bagging or plant leaves to keep the leaves that can cover the grapes as much as possible. When the sunshine is insufficient, it is easy to cause poor corolla shedding at flowering stage and low fertilization rate; In the stage of flower bud differentiation, flower bud differentiation is poor and parthenocarpy is more; In the growing period, the plants are long and the internodes are long. Not bearing fruit or parthenocarpy; Diseases and poor quality in fruit expansion period; When ripe, the color is not good and the sugar content is reduced.