The maintenance-free, award winning, patented EarthBox gardening system controls soil conditions, eliminates guesswork and more than doubles the yield of a conventional garden - with less fertilizer, less water and virtually no effort. Each EarthBox garden kit includes: 4-piece gardening system (EarthBox container, aeration screen, water fill tube, 2 b/w mulch covers), 1-pound fertilizer (8-3-5), 1-pound dolomite, 4 casters. Measures 29-inches (long) by 14-inches (wide) by 11-inches (high). Soil capacity of 2 cu. ft. Water reservoir capacity of 3-gallons.