I have used the soil that is similar to what you are talking about. It is a GREAT top soil additive but I have also found that it cana also be used in pots as well. However, the soil is very hot. It is great for outdoor grows. Potting soil is what I would reccommend though cause it is made for pots. I would add some soil additives with it so that the soil is full of nutrients for the plants to feast on.

Happy Toking :rasta: