2-3 Moisture

Moisture has a huge impact on grapes and different stages of growth require different water management. During germination, a large amount of irrigation is needed to keep the soil moisture at 70- 75% of the field water holding capacity, which will allow the winter buds to germinate more neatly. During the growth period of new shoots, if the soil moisture content is more than 60%, irrigation should be stopped to avoid the branches growing too fast and affecting the quality of fruits. During the fruit expansion period, supplemental water is needed every 7-10 days to ensure good fruit growth, but too much water may make the fruit smaller. As the fruit turns color, irrigation should be reduced to allow the grapes to increase in sugar and decrease in acidity. Supplemental water is also needed after harvest to help the plant recover, and freeze water irrigation is needed during the winter dormant period to improve the roots' resistance to cold.