How's it looking can I tell from leave s as loops not come yet

[Newgrow31]

Plant in the middle How am I doing I think its got a couple weeks left
Loop is taking ages to come.
Will I be able to tell from the leaves as they start to yellow or is that not a good way of gauging cheers

 

[Arthur]

Lots of white pistils, guessing 3 weeks. As to fading, not all strains do, and if grown in time released fertz, or fed straight through, you won't see a fade.

 

[Mañ'O'Green]

I would say two or three weeks to go.

 

[NorthernLights_420]

When all those white hairs turn red or orange and curl in you'll know it's time to check out the trichomes. You got a few weeks to go yet for sure. They will look like done buds when they're close to the finish line. There may be some white hairs here and there still but most of them will turn colors and you'll know it's time for harvest then. And you can go off your trichs too but bud appearance is definitely key to determining when it's time to harvest.