Interested in organic landscaping? Many readers ask me for tips on achieving a killer landscape design without resorting to killer chemicals. There are a number of ways to achieve this goal, but you must be willing to experiment. A technique known as "companion planting," for instance, can help you eliminate the use of chemicals. For example, planting garlic near roses repels aphids. Garlic also has fungicidal properties that help prevent diseases in nearby landscape plants. Willing to give garlic a try? About's Gardening Guide, Marie Iannotti, tells us all about planting garlic.