Okay, so how do you actually change soil pH? To lower pH and turn hydrangeas blue, we recommend adding Espoma Soil Acidifier to the soil. It’s safe, long-lasting, and approved for organic gardening. Use 2 1/2 cups around the plant’s drip line every sixty days, until you reach the desired shade of blue. Prefer pink? Then use Espoma Garden Lime . Sprinkle about 2½ to 5 lbs. per 100 sq. ft. in the Spring or the Fall. MORE...
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