Tip #11 Of 14: Uses For Leftover Tea And Coffee Grounds...
Tip #11 Use leftover tea and coffee grounds to acidify the soil of acid-loving plants such as azaleas, rhododendrons, camellias, gardenias and even blueberries. A light sprinkling of about one-quarter of an inch applied once a month will keep the pH of the soil on the acidic side. Source: HGTV.com/... Sign in to see full entry.