hey man,
never used the miracle grow, and i am a newb.... but i have heard negative things about miracle grow products in a bunch of different boards, and documents on cultivation..
some cheap nutes you can get from WalMart is that Alaska Fish Emulsion 5-1-1, heard good things about that stuff... run on search on yahoo for alaska fish emulsion....
you can get a small bottle of some good stuff from a hydro shop for 8 bucks more, will last you your entire grow and then some..

just my thoughts...

slim