Vermicast is the nutrient-rich organic matter produced by earthworms as they digest decomposed organic material. This natural fertilizer is often referred to as worm castings and is known for its high levels of essential nutrients, beneficial microorganisms, and improved soil structure. Using vermicast in gardening enhances soil fertility, promotes healthy plant growth, and helps retain moisture. It can be mixed into garden soil or used as a top dressing for plants. The presence of earthworms in the soil also aids in aeration and drainage, further benefiting plant health.