Lowryder ~ Last 3 weeks of flowering..

Hi everyone, just a quick question really, well 2 actually lol :)
I have 2 Lowryder # 2's ready to harvest on approx 17th Feb. I've got a lot of bud on, but have read somewhere that the cola really thicken up the last couple of weeks or so, is that right?
I've also read that for maximum yield you should put them in 18/6 or 20/4, any ideas is that right or not before i take them out of my flower room which is on 12/12?
Thanks for any help given !!

no replies :(

Yeah I would run those at 18/6 for its whole life.

SaH