Bonsai Soil Professional 3 Gallons - Priority Mail Large Flat Rate Box SHIPS USPS PRIORITY SHIPPING - USUALLY DELIVERS IN 2-3 BUSINESS DAYS Bagged and shipped in a Priority Mail Large Flat Rate Box Approximately 3 gallons Professional Blend (based on Boon's Mix) is an inorganic blend of equal parts Akadama, Pumice, and Red Lava with a small amount of crushed granite, (in honor of Boon's vision), and charcoal to "sweeten" the soil. Each ingredient has been tried and chosen to give optimum functionality. It provides superior water retention, drainage, and nutrient uptake. We recommend this blend for conifers.