How to Amend pH Levels of Blueberries After Planting

Blueberries, like most plants, grow best in specific soil conditions. For blueberries, soil should be more acidic, which means it has a lower pH level. High pH levels can cause stunted plant growth and even plant death. But once you've discovered what's wrong with your blueberries is incorrect soil acidity, how do you go about correcting it? According to the Michigan State University Department of Horticulture, blueberries grow best at a pH level of 5.0; this level can be achieved through the proper application of fertilizer--even midseason.

Things You'll Need

• Lime (pulverized, granular or pelletized)
• Ammonium sulfate

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Instructions

1. • 1

     Test your blueberry soil's acidity. This can be done by taking the soil to a lab or with at-home kits you can usually purchase at garden centers.

   • 2

     Apply ammonium sulfate if the pH level is above 5.0. Start by mixing a small amount into the soil on either side of the plant and testing the resulting pH level the next day. Continue this process until the pH is around 5.0.

   • 3

     Apply lime if the pH level is below 5.0. Start by mixing a small amount into the soil on either side of the plant, and then testing the pH level the next day. Continue this process until the pH is around 5.0.