Have a look at the trichomes. The leaves are nothing to worry about. The plant isnt stressed. All plants do this as they come to the end of their lives. See what colour the trichomes are, and harvest when your happy with the colour. NEVER harvest juding by the pistils [hairs] as they tell you nothing about the maturity of the THC - and pistils turn red/orange as they dry anyway.

You'll find the flowering time for this strain is 8/9 weeks, and your on 9 weeks. Still check the trich's though, and harvest when your happy.