Vermicomposting is the process of producing organic fertilizer from biodegradable materials with earthworms. Earthworms—which feed on compost—digest the organic matter in their alimentary tract and produce sanitized and texturized humus that is free from chemical impurities called castings. Although vermicompost may be low in nitrogen, phosphorus, and potassium (or NPK), it contains essential micronutrients like calcium, magnesium, manganese, copper, iron, and zinc that promote plant health and pest/disease resistance.

In terms of waste management, vermicomposting contributes to the elimination of problems on waste disposal and the need for landfill and dumpsites. As for soil fertility, it improves the water-holding capacity of soil, soil aeration, and texture thereby reducing soil compaction. Lastly, vermicomposting poses economic benefits as it reduces the cost for chemical fertilizers and pesticides, brings additional income, and provides employment opportunities by selling vermicast and vermicompost in the locality.

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