for a soil SOG, use 6"x6"x8" square pots. (6L,6W,6depth) do not use moisture control or any fertilized soil. DIY untill you master the art of fertilizer. you will just end up burning your shit if you dont.
Never use full strength ferts. always use 50% strength or less. less is more.
bloodmeal is best used in small consistant doses. it will burn the piss out of your leaves if not used correctly
bonemeal is pretty much the same.
pack them in as tight as you can get them.
do not expect rapid growth like you would see in the hydro SOG setups...
expect 8-12 weeks of 12/12 flowering using clones only.
seedlings just wont work.
cough up the extra cash and get feminized seeds from a reputable breeder...
it will take about 2 months of veg to get one mother ready for clones.
if you are running a large SOG, expect to be able to take 10 cuttings per mother plant in the begining.
having multiple mothers is good for many reasons... i like to keep 3 at all times. as your operation expands, and you get a few harvests, you can reduce the amount of mothers you use, as you become familiar with your choice of strain it will become apparant quite quickly which moms/pheno you will want to keep.
you can keep a mother forever, with enough tlc. personally, when i select mothers, i plant from seed and torture the plants relentlessly. after 3-4 months, if there are survivors that show the traits i desire, they move to the mom cab. mother selection is vital. you dont want weak genetics with a SOG, unless you like wasting time.
you will need HID lighting. flowering can be done with floro's and CFL's, but for SOG, if you want rapid growth and dank buds, HID is the only way to go. you want 400w minimum for every (16) 6" sq pot. i prefer CMH, most prefer HPS.
if you start small, expect to expand slowly, but experience less problems along the way.
if you start big, expect to learn alot very quickly, and prepare to epic fail once or twice before you get a viable crop...