Blueberry plants require a loose, organically rich, acid soil (pH of 4.5 to 5.5) to do well. If you have not yet amended the soil with appropriate amounts of soil sulfur, then at planting, you must work into the soil 1/4 to 1/2 pound of Aluminum Sulfate per plant. To help maintain long-term soil pH, apply Blueberry Special Fertilizer #51125 each year, and top-dress around plants with aged manure & 1-1 1/2 lbs. of Hi-Yield® Soil Sulphur every 3-4 years.