i'm in the US. I grow in round plastic pots, 12" in diameter on top, about 10" tall, about 7" on the bottom. They hold about 10 qts of potting soil. I can grow to a good size with those. I grow anywhere from 4-8 plants at a time, so I need 40-80 quarts at a time. I'm just getting used to soil growing, i've come a long way. I just started a couple of years ago with no gardening experience. I use LEDs in grow tents that I'm able to maintain at good temps, typically in the upper 60s or lower 70s. I've had pretty good luck with the GH trio with calmag as the site recommends, just I think I'm not maximizing what I can do with proper soil selection and proper watering techniques.
I think my problem is that I've had a lot of luck with potting soils, but its all it is, luck. I feel I could be growing twice as much if I would just do the basics better which is why I'm here.
I'd like to understand what is the "preferred" soil solution by the growing community for a simple home grower like me. I'm willing to put in the time, but at the same time, I cant make my own composts like many people! i'm looking for a better soil solution then what I can buy at my big box store, all I've been doing is store bought potting mixes, and I think I'm ready to graduate to the next level, I realize its gonna be more work, but I'm just looking to understand what is the next level from where I'm at? Ideally something close to affordable as potting soil, but more importantly something is relatively difficult to screw up.. The other thing is, i'm pretty used to using the GH trio as my sole source of nutes with calmag, so I need to understand what I would have to change about my feeding? just looking for guidance to go further. I feel I got a good handle on lights, temps, nutes. all I'm missing is proper soils and watering techniques and then I can take over the world.......