Help: leaves dying

[Lonewolf96]

Hey it’s been awhile since I posted but I attached some pictures of my grow. It’s been 11 weeks everything has gone super smooth until now in the last 3 days or so the leaves started getting discolored like a chemical burn but I’ve been good with my nutes and haven’t changed anything. I use fox farm in coco and add cal mag. Always keep roots damp. The tricomes are just starting to get some milkyness my friend grew this strain for like 14-15 weeks so I figure I’m on the right path. Any advice on what’s going on/fix

 

[Stormblessed]

I have seen that on many pictures of plants late in flowering, maybe it has something to do with the plants using all their energy to grow bud so the fan leaves discolor, that is just a guess, I’m sure someone else with way more knowledge than me will jump in

 

[Sancheh]

Nothing to worry about there!!