all right bruv i aint been funny but a coal shed aint the best place to grow its gonna be cold damp and dirty which are all the things u dont want. if i was you i would invest in a grow tent or just try and make some room in side your house other wise it just aint worth it simple as. you should really check out kp's cannabis collage in the basic growing section also in there is a guide to setting up your grow room that should help you out and point you in the right direction laters bruv i hope it all goes ok for you peace!