Weed mat is a type of landscape fabric or plastic sheeting used to suppress weed growth in gardens, nurseries, and agricultural settings. The mat is placed over the soil and prevents sunlight from reaching weed seeds, inhibiting germination. Weed mats allow water and air to penetrate the soil while reducing the need for chemical herbicides. They are commonly used in rows of crops, around trees, or in garden beds to maintain weed-free growing areas.