This may help you a lil... i have a friend that grows and has been growing for as long as i could remember (infact when i was younger my father found our plants in the backyard anyways he uses that soil and loves it! after i finish with the sets that i have i am gonna use that soil becuase i am tired of having to order my shit and get it a week later when i need it now lol. I hope this helps
ps he grows some BOMB weeed and only uses some random ass plant food like 10-15-10... think its schultz or something... not sure but its really nice and healthy buds come harvest time