The answer to 'how does mulching work' is that mulching is the process of applying a protective layer of organic material, such as wood chips, leaves, or bark, around the base of plants and trees. The main purpose of mulching is to help retain soil moisture, suppress weeds, and improve the overall health and appearance of your landscaping.
When you apply a 2-4 inch layer of mulch around your plants, it acts as a barrier that helps prevent water evaporation from the soil. This keeps the soil moist for longer, reducing the need for frequent watering. Mulch also blocks sunlight from reaching weed seeds, preventing them from germinating and growing. Over time, the organic mulch will break down, adding nutrients to the soil and improving its structure for healthier plant growth.