The amount depends on rate of previous growth. Use three separate applications for optimal growth. Ammonium sulfate is a good acid forming fertilizer. Blueberries prefer moist soil, but also adequate drainage. Apply 1 to 2 inches of water when irrigating once every 2 weeks in summer.
Blueberries are well adapted to drip irrigation systems.
Mulch up to 6 inches to conserve water. Diseases and Pests Mummyberry and botrytis fruit rot. Mummyberry can be very severe in wet weather. Scale, root weevils and cherry fruitworm can be a localized problem. Birds will be a persistent problem.