Well mulch helps keep the moisture underground when facing the Texas heat. By keeping as much moisture underground, that means less watering. Mulch also helps to prevent unwanted plants from growing, such as weed pants. And even if they do grow it will be easier to pull out later. Mulch is like adding insulation to your plants and flower beds to keep it cool in the summer days. Plus another benefit is that it looks amazing. Makes your garden look sophisticated.