SF guy and everyone, hello. The 420 soil experiment produced the following results. Superior flower and leaf size, easy to grow, just good water and rhyzostym. The problem: Soil too dense to drain/flush heavy Nitrogen. In future, my 420 soil would be mixed with 50% perlite for drainage, 40% 420 soil and 10% combo of Dolomite lime for ph stability, a cup of Bone meal,(2-24-0), placed mid to lower in the pot for bloom, a half cup of epsom salt for Mg (bloom). This mix support's a long SCROG training veg of 4-5 months plus, Mother Plants, and longer vegs. AD sensi-grow works well. Mix A&B into the SAME gallons of water. This is not explained clearly on container. As concentrates, Sensi A+B= poison gas,(J/K, LOL). They do not mix well without water. Mix up 2.5 gal containers of base. Use 4ml/liter of both A & B, or about 35 ml per 2.5 gals , then add 2ml/liter 17ml/2.5gals Easy math, great food and boosters big bud and bud candy are manna to my babes.