Lasagna Gardening Simplified
...Scott suggests skipping the double digging, cardboard and kitchen scraps. The double digging disrupts soil texture, the cardboard interferes with water penetration (I know this from experience) and the kitchen scraps create a plant nutrient overload. Instead Chalker-Scott suggests simply a very thick layer of mulch–12 inches. Mulch is often free, as many cities give it away, and it does wonders for the soil. Mulch, in fact, breaks down int...