People are always teaching me something here. I love the low key nature of these forums.

Thanks for the input oldmac. The 20 hour day approach is interesting. But you would need a 20 hour timer to make this work. I can't see doing this manually. I'm guessing that some of the newer digital timers or higher end greenhouse timers would permit this kind of manipulation.
bigsby Reviewed by bigsby on . 10/14 I was looking at the photo-period graph in Marijuana Botany, and according to the graph, maximum THC production occurs with about 10 hours of day light. Doesn't that seem logical that when you are flowering, you should reduce the light period to 10 hours during the last 3-4 weeks for maximum effect? :D Rating: 5