Mulch Natural Undyed (BULK) 1 Cubic Yard Mulch is a material placed over the soils surface to uphold moisture and improve the condition of soil around the ground, plants, and trees. Mulching is one of the most beneficial things a home owner can do for the health of a tree and his or her plants. It is well known that mulch can reduce water loss from the soil, minimize weed competition, and improve the structure of soil. If appropriately applied, mulch can give landscapes a scenic and very aesthetically pleasing, well-groomed appearance.