Those have some time to go. your leaves haven't faded much, so water-only is okay, but you may want a slight feed schedule again. Maybe, less than before if that's 2 weeks of a flush.
Need to observe trichomes on the bracts - not leaves.
https://duckduckgo.com/?q=trichomes+marijuana+harvest&t=ffab&ia=web
Get that ~$7 usd 60x currency magnifiery or something fancy like a digital usb mircoscope for your phone.