This powerhouse of a mix is a blend of sphagnum peat, perlite, fish compost, leaf compost, worm castings, biochar, blood meal, kelp meal, crab meal, feather meal, Dead Soldier fly frass, fish bone meal, gypsum, soft rock phosphate, alfalfa meal, oyster shell flour, Wollastonite rock dust, Volcanophos rock dust, and Huplaso basalt.