Grapes should be sprayed with foliar fertilizer and watered.

Watering is ok, but you can't water the leaves or spray water, otherwise it will lead to fertilizer loss.

Foliar spraying fertilizer is greatly influenced by wind, temperature and humidity. In a certain range, the higher the temperature, the faster the leaves absorb fertilizer; The greater the humidity, the more fertilizer is absorbed; The lower the wind speed, the longer the wetting time of fertilizer solution on the leaves, the more fertilizer absorption and the smaller the drift loss. In order to improve the spraying effect of fertilization, it is best to spray it on cloudy days when there is no wind, and it should be carried out in the morning or evening when the temperature is suitable (18℃-25℃), the humidity is high and the evaporation is small. Should be based on tender buds, young leaves and leaf backs. Spraying fertilizer makes the fog fine and evenly distributed, until the leaves are all wet, and the fertilizer solution is about to drip without falling.