bonsai soil mix by tinyroots - all purpose organic mixed bonsai tree blend + used for all varieties of bonsai trees, 2.5qts. bonsaioutlet specially formulated as an all purpose potting medium for virtually any bonsai tree. when it comes to choosing bonsai soil, using right blend is important. that’s why we only carry soils blended exclusively by tinyroots. the soil you use affects rooting, feeding, watering and transpiration; it is where half your tree lives so this is our second biggest consideration in maintaining your bonsai. our soil is a mix of 100% organic double-sifted compost mulch, calcined clay, vermiculite, and frit. contains over 28 vital trace elements and minerals that are essential for the health of your bonsai. 2 quart bag model number: sl02