Plant Food for Blueberries

Special Formula

• A 16-8-8 fertilizer is appropriate for blueberries. Some formulas include 4 percent magnesium, according to the website of Purdue Cooperative Extension.

New Plantings

• A year before you plant new blueberry shrubs, test the soil pH. It should register between 4.5 and 5.0, according to the Michigan State University Extension website, and may be adjusted with sulfur if necessary. Four weeks after you plant, sprinkle 1 oz. of 20-0-10 fertilizer around but not directly touching each plant.

Established Plantings

• Most blueberry bushes will only need additional nitrogen each year, according to the MSU Extension website. If your soil pH tests below 4.0, adjust the soil with urea. If it is above 5.0, adjust it with ammonium sulfate.