I love the idea of transforming garbage into free mulch and fertilizer. Composting is a win-win: I save money and keep my eggshells, coffee grounds and weeds out of a landfill . Compost is the single best additive available for improving any soil type. Is your soil too sandy? Add compost. Too dense? Add compost. Lacking nutrients? Say it with me now: Add compost! That’s why we gardeners call it “black gold.” It’s as close to a cure-all as we can get, increasing the water-holding capacity of