Urbanscape® Green Cubes are made of needled rock mineral wool. Green Cubes are used as a growing medium for the professional cultivation of plants or as a high quality additive used to improve soil and save water in a variety of different landscaping applications. Rock mineral fibres are produced in a heating process entirely without any chemical binders and have superior water storage and release capabilities that make water and nutrients easily accessible to plants. This in turn improves soil structure and reduces environmental stress on plants.