The reason I ask is because of my two last attempts to grow some good weed. I wouldn't claim to have a killer set-up but enough to give me around 20g per plant, so my first grow was in my closet with around 200w cfl, with the right spectrum ofcourse, I spent about 3 hours a day researching so I feel like I did quite a good job with the low-budget equipment I had. My second grow was a mix between 6 hours of intense sunlight (South Amerika) and the same cfl set-up, with a cardboard box covered with black plastic and a thick blanket for the 12/12 period. I had mixed results as I made a lot of mistakes (at least the second time) but I still feel I should have got a bit more out of it than what I did. Now I'm going to try again, in my closet with just a slightly better set-up than before. To my question: I never really considered having good soil and even if I had read about its importance, I never really understood why some soil was better than other apart from nutrition and how well the roots could grow. Is good soil a crucial part? it would save me a lot of time if I only changed to quality soil and did the same way as I did before and got the shy result I'm looking for. Or would quality soil compared to crapy soil, using the same food, lightning and ventilation only give a slightly better result?