How does mulch help conserve moisture and control weeds?

In the context of gardening and agriculture, mulch serves as a vital protective covering—such as compost, paper, or sawdust—spread over the ground to enhance soil health and manage plant competition.1

Conserving Moisture

Mulch acts as a physical barrier that reduces evaporation from the soil surface. By shielding the soil from direct sun and wind, it helps maintain more consistent moisture levels, which is essential for plant growth when rainfall is insufficient. This retention is a key objective in effective soil management, as it ensures that water remains available for crops rather than being lost to the atmosphere.12

Controlling Weeds

Mulch functions as a mechanical method of weed control by covering the soil surface, which prevents weed seeds from germinating and establishing themselves. Unlike intensive tillage, which can damage crop roots or spread perennial weeds, mulching suppresses unwanted growth without disturbing the soil structure. By creating a barrier that denies weeds the light and space they need to grow, mulching allows desired plants to thrive without the need for constant mechanical intervention.3