As this is my first grow I'm unsure about whe...

When roughly 2/3 of the pistils have turned red and retract is an ok indication. It is best to go off of the trichome colors however. You can look at the trichomes a few different ways. You can take a photo and then zoom in on the photo, for some people the camera is good enough that they can see the trichomes up close. Another way is to buy a jewelers loupe that has 60x magnification. Or a digital jewelers loupe. You want most of the trichomes to be cloudy white in color just turning to an amber color. I find that this gives me an optimum desired effect. Good luck!

Hi @Jallow! Pistils can be a clue, if you noticed that new pistils have stopped appearing and old pistils have almost all turned red and curly, but the best way to ensure it's the right time is to look at the trichomes with a magnifier/microscope. Clear/Transparent/Skinny trichomes mean it's too soon, Milky/Cloudy/Fat trichomes mean the harvest window is open, Amber trichomes mean the harvest window is ending, and THC is degrading. Looking at your last pictures, I think you're 3 to 4 weeks from harvest. I'd recommend to keep on feeding for at least 2 weeks, then give it a good 10-15 days flush depending on the trichome's evolution. Hope this helps, I'll be around, keep us up-to-date and happy growing!

It looks to me like they need 2 more weeks at least; the calyxes still have to swell and the pistils have to retract and turn red. The calyxes are the seed pods, in this case empty, when swollen they give the buds their fat look.