This are an effective growing media for vegetables, fruit and flowering plants including tomatoes, orchids, strawberries and gerbera daisies. They can be used in hydroponic grow systems, automatic drip irrigated containers, ebb-flow systems and NFT tables. Growstones are developed to provide the ideal ratio of water retention and aeration while at the same time being light-weight, disease free and packaged in a 1.25-cubic foot recyclable paper bag. This product weighs 14.8-pound. Measures 33-inch length by 16-inch width by 7-inch height.