I will tell you this. My very first grow was with MG soil. and it turned out awsome. The only thing you have to worry about is the PH changes in the siol because of the time released fertilizer. I went light on my fox farm butes when i got hem because of the already fertilized soil. I did loose a few fan leaves but the grow turned out alright. Just remember MG does work. Its not recommended but it does work. Just WATCH THE PH.