When you need to keep your flowers and shrubs moist during the summer and protect them from pests, mulch offers the most efficient solution. Mulch is any material that you spread over soil as a secondary covering for roots. It helps to retain moisture, discourage weeds and lower the soil temperature. It also increases the attractiveness of your garden beds and separates it from the grass. If you invest in organic mulch, it also improves the soil's fertility over time as the mulch decomposes. Here is more information on mulch and what to consider if you buy a few bags for your garden beds.