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Using Coffee Grounds for Plants—the Pros and Cons
Some plants do not benefit from adding coffee grounds to their soil. Plants like lilacs and lavender prefer alkaline soil, so the slight acidity will harm them. The caffeine in coffee grounds can ...
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Are Coffee Grounds Good for Plants? An Expert Weighs In
That’s not true, McKinley says. “Coffee grounds have a pH between 5.5 and 6.5,” she says. “Most plants like a soil pH between ...