When should I harvest my plant?

Hey guys got this Purple Haze growing. Its exactly 8 weeks. First time grower here.
I had it growing with another Blue Dream but the Blue dream finished up about a week ago but this one is still doing its thing.
It looks a bit odd tho? Alot different then my Blue Dream (I know strains grow alot differently)
Wanted to get your oppinion. If you have trouble seeing the colors of the pistils about 50-60% of them are dark and curled in (so im thinking another few days to a week?)
I have been flushing her for the last 2 weeks. Growing with a 600W HPS in fox farm soil.

2 weeks at least.

2 weeks, 4 hours and 20 seconds!

Should I worry about the yellowing Leaves due to the flush? If I would of known that she had another 2 weeks I wouldnt have flushed so early...
Should I just keep feeding her straight 6.5 water? Or give her some nutes?

A nice feeding would really help fatten up those buds but either way your looking at 2 and a half weeks. Plants tend to yellow as they finish up...

Ill give her some nutes one more time before the final flushing since I still got some time Thanks guys!