Should blueberry plants be fertilized?

Question:

Should blueberry plants be fertilized?

Answer:

Established blueberry plants benefit from an annual application of an acid-producing fertilizer, such as ammonium sulfate.  In early spring, apply ½ to 1 pound of ammonium sulfate per 100 square feet of garden area.  Ammonium sulfate supplies nitrogen to the plants and also helps maintain soil acidity.