If you want to go with a Miracle Grow I heard to cut it w/ 30% Perlite. Stinky can explain and knows more about it... If I was in your shoes I would go to LOWES PRO-MIX $7 and change gets you a bail... Then go w/ a Hormone and fertilizer because with the MGrow you would have to feed @ like a 1/4 strenght. Then it goes higher as time goes on because the Fertilizer in the soil breaks down!!!

Thats My Two Cents Good Luck GL:thumbsup: