With the light you got even if you were growing in a proper medium an all other factors were cool. you'd be lucky to get an ounce o' bud. i'd get a much bigger pot 'bout five gallon, add a few more fluro's or try keep it cool enough in there with a 250w hid. if ya wanna do organic get rid o the cow shit and amend some multi purpose compost wi' bit of perlite. good organic slow release is worm castings. why not try semi-hydro - two parts vermiculite two parts perlite one part worm casts. feed from start wi' half strength hydro grow food. ps. would like some tips on cheap ways to grow. currently spending £50/week just on electricity. all worth it in the end though