I do the 18/6 deal but I put some 6" plants into bloom and back. 3 weeks old maybe. Long story but I screwed up and wound up taking some clones from a male. He was late to grow a pecker so I thought he was a girl. Mistake. So I had a wad of fresh clones which I did not know was male or female. Moved them all to 12/12 and sure enough I had took more clones off the male than off 4 other females. Showed sex real fast. Anyway got that problem straightened out and the girls survived and made a bunch of good bud. Got to love them happy endings huh?
BW