if you want to keep it simple you have to transplant those plants into the plastic cups i am talkin about cause plants won't grow the way you have them they will fight for root space and die. even if transplanted in a larger container all close like that fan leaves would be all bunched up and no place for buds to form. try it you like but you will wast time. you have to seperate all those plants. into a larger pot. one for them to flower they will need at least 6 inch pots each. that takes up some space. so ether go for the 6 inch pots now and veg them under whaterver light you have. most likely you don't have space for this. so do the plastic cup thing after they are in the plastic cups keep vegging them. cutting the tops. You want a bush. it takes one plant to do this. all you have to do is keep topping that plant and since those are from seed they will take a while. the little plastic drinking cup with the holes in the bottom. (for no salt build up). will slow down there growth and let them get older. you need that if you started from seed. they won't flower for a while. this won't take too much space. remember one plant per cup. you have to do that if you don't have space try to pick the ones with the best roots and keep them. rid the rest if no space. after vegging as long as they can hanndle those cups transplant into the 6" pots or bigger. take all those plants and put them under a 12/12 light cycle WITH NO DARK.
are you doing this outside or inside?
get some nice rooting fertilizer right now. B-1 or superthrive or something. use it when you transplant and feed it that for a bit.
I know you don't want to transplant but you really do have to.
all it takes is one plant for a bush. just keep topping it. keep it small and bushy.
what are you thinking about doing?
they will die very soon in the thing you have them in. sorry.
you can try, but its a wast of time.