Half peat/ half soil
Appease your acid-loving transplant in less-than-acidic conditions by mixing 1 part peat moss (which is naturally acidic) to 1 part garden soil in the planting hole, then applying sulfur to the top of the soil just beyond the hole.
moss will get the plants started and by the time their roots reach into the soil outside the peaty area, the sulfur will have had time to lower the pH,
5. Dan says you'll also need to add more sulfur in the future. "Probably every year if you started with a pH 7 soil, every other year tor pH 6.5; and every 3 to 4 years it your soil was pH 6." He cautions that you should apply sulfur only in the winter when the plants are dormant.
Even if your soil isn't naturally acidic, you can grow acid-loving plants like azaleas, rhododendrons, or blueberries, says Dan Hartmann, general manager of Hartmann's Plantation in Grand Junction, Michigan. The secret is to add the right amount of sulfur to the soil to lower the pH. Dan explains how to figure out "the right amount."
Dormant blueberry bush
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