pruning as in overall trimming? NO!!!

top, pinch, cut or prune (whatever you care to call it) the top when still a seedling at the 3rd-5th node. do not trim the ends off of branches...unless taking clones, then from the bottom, preferably and best never to cut anything during flowering. if you're trying to get more light into the interior bend the plant or tie down at 45 degree angle.

showing 1/4" flowers? not buds? if they're beginning to flower you should be seeing fingertip-size buds with lots of hairs coming out...if you're looking at are more like a true flower then you're looking at males. yes, 13/11 will trigger flowering...why is it set on that?