Bonsai Jack Inorganic Bonsai Soil Mix 11011 pH 6.7. 3.5 Gallons Proprietary mix resulting from 100 plus lab tests. Optimized for pH, water absorption, evaporation, bulk density and particle size. Available in 2 Quart, 1 Gallon, 2 Gallon, 3.5 Gallon, 7 Gallon, 14 Gallon and 28 Gallon SKUs Bonsai Jack products are ordered by the full truck load, crushed, screened to 1/4 inch, rinsed/washed, insect inspected, dried, PH tested, CEC/cation exchange capacity tested, moisture retention tested, moisture release tested, nematode tested, bagged and shipped to your door. BonsaiJack offers two bonsai soil mixes. Inorganic(11011) and organic(221). Organic(221) is recommended for bonsai trees still in development and/or repotted every 1-4 years. Inorganic(11011) is recommended for finished bonsai trees that are repotted every 4-10 years. 221 organic is the best choice for the vast majority of bonsai.