Spread it evenly in a band 6 to 12 inches from the plant to avoid root damage. Repeat in late June if plants have been watered regularly. Each year after the initial planting, apply double the rate until the total of two applications reaches 2 cups. This is the maximum rate normally needed. Watering Blueberries are shallow-rooted plants that need about 2 inches of water per week during the growing season.
Water is necessary for fruit set, fruit size and plant vigor.
Blueberries need water, even after harvest, to set flower buds for next year's crop. Pruning The first year, cut back the tips to remove the flower buds. Remove any weak wood. The following year, leave some of the tips uncut to allow some fruit to develop. Again, remove any weak wood.