Um use a sterilized potting soil, ( no Miracle Gro it has time realeased nutes and cannabis doesn't like that) Perlite, construction sand, and worm casting. Mix it up probably 40% soil 30% perlite 20% construction sand, and 10% worm castings!
Hey whats a good soil I can use to grow these plants (something I can find at Pike or Home Depot) I am going to have to put this one outside for now.
I added something to your comment by the way.