This multi-tray worm composter speeds up the composting process as worms add nutrient-rich castings to the mix. Fill each stacking tray with food scraps, junk mail and other household and garden waste. Worms start in the bottom tray and migrate upward as they turn waste into compost. Just pull your finished compost from the lower trays. Creates nutrient-rich fertilizer for houseplants and gardens. The moisture captured in the bottom tray is also a fantastic liquid fertilizer known as "worm tea". Complete instructions for easy set up and management of an odorless bin year round, indoors or out. Includes shredded paper and 1 coir brick to get you started. Recycled and food grade plastics, made in the U.S.A. 4 Tray composter: 16"L x 16"W x 24.5"H.