Problem

curling down and burnt tips.. possibly nutrient overabundance of some sort.. but, don't dial back too much in flower. Plants are more sensitive and show this sort of thing more often in bloom than in vege... difficult to know what it is for certain. However, when i look at diary, i see a lot of yellow leaves near bottom -- can be normal with a thick canopy. But, that's a sign of a deficiency of a mobil nutrient. Work out your ppms of what you have feed consistently and make an educated guess.. don't just do something without some elbow grease invested into effort. definitely don't do what some random person says on the internet :P

Hello, I usually get a few yellow leaves that die off that are low or in the shade. But the claw can often be a sign of root stress either from watering troubles, or root bound. Sometimes too high of wind...and excess nitrogen but with the yellow leaves i think we could eliminate the nitrogen problem. Examine of few of those possibilities and see if any might apply to your plants. This far into flowering it will typically make it to harvest anyway...but still worth figuring out.👍