How do I know when to harvest

Hello ladies and gents

just wondering when to harvest? I am a complete noob so any information is greatly appreciated

I am 12 weeks in total today. This is the 40th day of flower.
Also any advice on how to get the buds bigger I use mills nutes and was thinking maybe add more PK of C4??

Lots of white hairs, at least a month

your buds will swell when ripening. Just keep the plants healthy and they’ll do their thing, no need to add extra boosters.

Looks at least 3 weeks or so away still.

Vast majority of hairs will turn red & shrivel, then look under a larger bud cluster at the first node, you'll find 2 calyxes there. Check the trichs on these when they look like this.


This girl is not finished.