Basic Bonsai Soil 8 Quarts (2 Gallons) about 15 pounds BASIC BONSAI SOIL FAST DRAINING Prevents root rot, Prevents over watering Aprox 60% Aggregate, 40% composted fir bark fines. Double Sifted, Lava cinder rock and Calcined Clay STOCK UP NOW, BOTH BAGS TOGETHER ABOUT 15 POUNDS