I used Scott's potting soil for my first grow and it failed terribly. I don't entirely blame the soil. But it had a hand in it. It was my first grow and I did almost everything wrong. No ventilation, not enough adequate lighting, overwatered, heat buildup leading to plant shock. After all that abuse still managed to get a tiny smokeable amount. Just get some FFOF mix. It's just as inexpensive as the brands you just mentioned.