Thanks for the advice guys. Yeah mine's a grape ape and it's super purple right now. I keep an eye on the forecast temps to be safe but I figure if it stays above 40 degrees (naturally flowers in 40 degree temps in September and October in many regions of the world) it should be fine. I'm at about week 7 but the buds aren't filling in the way I'd hoped. I'm hoping the temps/lack of light (just over 10 hours of light per day now) haven't affected it much. We shall see!
Can you show us a pic? Do you have any outside lighting, like a porch light or whatever which may be shining on the plant at night, and interrupting the dark period?