What I found to be a good combo is 2 parts potting soil, 1 part peat, and 1 part parrelite (bet I butchered the spelling). I got that lil' formula out of a growers guide and it works great! When ya get your soil, bake it in the oven at 270 for 20 min. to sterilize it. That will get rid of any potential bugs, mold spors, etc.... GOOD LUCK ON THE GROW!!! :thumbsup: