Mulch. What exactly is it? "Mulch is any type of material that is spread or laid over the surface of the soil as a covering. It is used to retain moisture in the soil, suppress weeds, keep the soil cool and make the garden bed look more attractive. Organic mulches also help improve the soil’s fertility, as they decompose." http://gardening.about.com/od/gardenmaintenance/a/Mulch.htm Besides the benefits of mulch for a landscape, adding this amazing material is really pleasing