Soil, I can go on for ever, here and a day. The best stuff can be had, it is at farm, discrete am/pm good stuff deliveries, cash only.
Mayans used slaves to mix and make soil. The farm deploys a custom 2 hp electric mixer and shredder, I call it the "100 Mayan Hands". Different soil is needed for different plants and systems of growing.
Mixing is important but dirty, scary work. It involves operating a giant Tesla motor attached to a giant smasher machine. Building some new safety systems on the "100 Mayan Hands" like gates, spring doors and such, so you don't get sucked in and spit out.