I read about in the grow faq. Do people commonly practice manipulating the photoperiod for 1 to 2 weeks during flowering. If so how do you when to switch to 21/12.... Anyone messed with this before?

yeah i would like to know more about this aswell....

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When I get down to the last few weeks of 12/12 I start dropping the time down by one hour each week until I get to 8 hours of light a day. Cant say that it makes a difference or not, but just what I have always done. I cant complain about the results, it works for me so I stick with it.

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Thats interesting rkm... I more curious about adding more hours of light... I dont see the benefit of subtracting light... P.S. Where you high when you posted that?

Depends on what you want your plant to do ie; veg or flower. In flower you can switch the hours to 14/10 to speed up ripening of the flowers or in veg you can leave them on for 24/0 for veg or if it's your mother. All depends on what you want your plant to do. KEEP SMOKE ALIVE!!

I read somewhere that if you stress WW for the last two weeks of flowering, (no lights at all), she strains her resins BIG TIME and the growth rate is really good. Have not tried it yet, but sounds intriguing. Must work on other strains as well IMO.

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i do this method and the way i understand it and what seems to work for me is:
i shorten the daylight period over the last little bit of flowering time to 10 hours. i have read that any less and they stop producing thc. the idea is that the plant will think it`s late fall and will want to naturaly reproduce itself, so it speeds up the final resining and sort of seals up the buds. but before they can start making flowers to reproduce you take it down. if you increase the light at the end it will most likely hermie.

i dont know if you mean at the end like this or do you mean at the begining of flowering going from 18/6 gradualy down to 12/12. if so that dosn`t do anything except drag the veg on longer and delay our mission, BUDS

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Dutch Treat/12/12 cfl

I wasnt at the moment but was working on it. My thinking is If you were doing 18/6 for veg and it takes 12/12 to make it start flowering, why would you go back the other way giving it more light? The idea of cutting the lights down is to simulate the shorter days at the end of the season, not to make the plant think spring is on its way again. In my mind working it down steadily to 8 hours of light a day hopefully tells the plant to get its ass in gear because the cold is really on its way and better finish reproducing quickly. Sometimes I dont make it to the 8 hour length, if the plant finishes before I get there then I harvest. I dont set that gradual decrease to 8 hours goal in concrete, its just a guide that I use.

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Natural selection applies to humans as well.

I appreciate you guys replyin' but would you please read the GROWFAQ... Its about adding more light when in full bloom... From what i take from it you would start adding the extra light around week 6.... The idea was to get more growth during daylight hours putting off harvest up to a week.... The photoperiord would be 21:36/12.... Peace
Read the article before posting.. Hopefully someone who has done this will reply..
growfaq>advanced cultivation techniques>Improving yields>larger yields> READ IT>Post.....

Then why did you even waste space posting this asking for opinions if you only want answers that agree with the FAQ? Just go with the FAQ and see if you are happy with the results, you dont need our input for that. Besides, the FAQ is on the internet so its gotta be true.

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Natural selection applies to humans as well.