Used coffee grounds are a gardener's best friend, especially if you're planting acid-loving plants like rhododendrons, hydrangeas and azaleas in your backyard. One of the easiest ways to incorporate used coffee grounds is to simply spread them on top of the ground and rake them into the soil. Then give the area a nice soak so the grounds can saturate and begin to release their acidity into the soil. Even if you aren't a coffee drinker, you can ask your local coffee shop to save their used grounds for you to use.
ANDREWS MCMEEL SYNDICATION