Harvest yet?

Before harvest, nearly all of the stigma should change color and start to retract. Based on that, I'm thinking you still have around 5 weeks to go. I will say that given your unique growing conditions, this may not be a standard harvest and you may not be able to use conventional wisdom. Therefore, I highly recommend going based off of the trichomes. You want a combination of at least 90% between milky and amber. When you choose to harvest is your call, but I've settle in the 30% amber range so I get a good body high without getting knocked out.