yo tuerto,
If you want something fail proof I would try making a small batch of subcools supersoil (and not overdoing it maybe 25-35% for your first go). Subcools says he doesnt worry about PH due to the Dolomite Lime as FarmerJoe420 stated above + you wont have to worry about nutrients as they would all be in your soil... Search Subcool supersoil and you will get plenty of info straight from the source. I went the supersoil route after my first experimental grow went bad from some lame MG soil stunted from the jump (my plants seem to be doing okay for my first grow- check it out if you wanna see it in action) It gives you that worry free and fail proof way of growing unless you over do it!
happy growing,
Bud