Comprised of horticultural-grade coir, each Cocogro Boss comes wrapped in a ready-to-grow bag so all gardeners have to do is add water. Great for raising ornamentals, vegetables, and more, biodegradable compressed coir hydrates within minutes and the bottom of every Cocogro Boss features a coarse-fiber coir mat to maintain medium integrity. The heavy-duty poly bag is black inside and white outside to assist in regulating root-zone temperatures and minimizing algae growth in hydroponics systems. This pH-stable Cocogro Boss measures eight inches square.