The best mulch can make all the difference in your yard. With so many types of mulch available, it can be difficult to choose. Mulches help with weed problems. If the mulch material is weed-free to begin with, and if it is applied correctly, weed seeds in the soil won’t germinate. Or if the mulch layer is deep, seedlings that do germinate can’t push up through it. Mulching plants is both functional and decorative. Mulch typically is an organic material spread on the soil surface to protect roots from heat, cold, and drought, and to provide nutrients to plants as it decomposes.