Compost is one of the best mulches and soil amendments which can be used in place of the potentially harmful fertilizers you buy at the hardware store. So, whats the catch? There is no catch; compost is 100% free and helps to enrich the soil. Compost creates an extremely healthy environment for plants, and those that live around the plant.
About one third of the space in landfills is taken up with organic waste from our yards and kitchens, just the type of material that can be used in compost. ( Compost Guide