Hey AliceDee....first of all, nice job whit that lst....i think that cab will be too small for 3 plants...it's not too good if the buds come too close to the lamps....you will need to tie the branches down, if you don't want that the plants get burned....if they get burnt, it will cause stress, and stress can cause hermaphrodites....it will be a bit crowded...

I have a question...is this schultz stuff organic?? You should get some organic bloom fert for flowering imo....