Mulching prevents water loss from the soil, reduces the growth of weeds, keeps the soil cooler in the summer, keeps the soil warmer in the winter, and helps prevent soil compaction. Most of all, mulching can add to the beauty of the landscape by providing a cover of uniform color and interesting texture to the surface. Mulching can improve the soil structure. As the mulch decays, the material becomes topsoil. Decaying mulch also adds nutrients to the soil.