Compost is a key ingredient in organic farming. At the simplest level, the process of composting simply requires making a heap of wetted organic matter known as green waste (leaves, food waste) and waiting for the materials to break down into humus after a period of weeks or months.Composting allows decomposed materials to be reused as a nutritious supplement for your garden, lawn, and house plants. A variety of materials may be used for composting, including leaves, grass, weeds, and some kitchen scraps. Autumnsettling in and the leaves filling your yard is a perfect time to begin composting.