Unnk
Well-Known Member
3 days before hand because what happens when you turn a plant 12 12 it generates more of the sexuality hormone wich is also the maturity hormone sexual maturity lol and thats why when you flick a plant to 12 12 its starts to flower because of the build up of that hormone so a 1-3 day dark period before flower will help boost the hormone and act as a way to start flowering faster and the 3 day dark period at the end also helps as well to finish a plant sub talks about it in one of his threads about having a small dark room to finish or start plants in if oyu have to becuase of cloning to much or lack of space or what ever the reason