how many more weeks left???

THT said:

Maybe heat stress but this seems like a common trait of some auto's. Of the auto's I have ran, I can recall several of them looking like heat stress but that was not the case.

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Hmmm I was gonna say I have no non autos in veg in same tent and there not showing any signs of heat stress.

Ooh can y'all do mine now? I think I am about 7 weeks into flowering. I figure I have 2 weeks left but I really expected these to look more like actual buds. I really have no idea when to harvest and if I should harvest in stages (i.e. the top 1/3 of the plant first and then wait another week for the rest)... Should I really be harvesting just based on pistil color?
I'm in Portland OR and this is my first ever grow. The strain is called Poonana which is a cross of Pootie Tang and Banana Kush.
Thank you!!!