it could be a number thing with you not givin any info ph to high temp to hot no nutes to much nutes you be the judge man
it looks like yall do ok though cola look good
For sure. It could be a number of things considering we only have pics. Looks like a combo of heat stress/overwatering/vent problems/pH problems, but thats as far as I can see.
These buds look a little airy, too.
Whats your lighting and ventalation setup?
What kind of nutes are you giving it and how often do you check pH of water or soil?
Ect?
We need to know more, please.
Good luck.