Yes, spent husks of roasted coffee beans can be used as mulch. Like coffee grounds, they are typically (though not always) acidic, and, when using for much and/or fertilizer, mix them with other organic matter. Acid-loving plants include blueberries, camellias, azaleas, dogwood trees, magnolia trees, rhododendrons, holly bushes, and more.
Dear Sandy,
Yes, spent husks of roasted coffee beans can be used as mulch. Like coffee grounds, they are typically (though not always) acidic, and, when using for much and/or fertilizer, mix them with other organic matter. Acid-loving plants include blueberries, camellias, azaleas, dogwood trees, magnolia trees, rhododendrons, holly bushes, and more.
—The Editors