Grow after 4 years

It's either overwatered or under fed. Need more info. Over fed with veg nutes would have tip burn and clawing. Looks from the pictures more like yellowing or chlorosis. Based on the stretch/internode length its not getting too much light. Its happening to larger and older leaves which means it's mobile. Is the soil drying between feedings and watering, I'm guessing here but it seems like it is, I don't see the tell tale droop of overwatering, but it's hard to tell. Overwatering can damage roots and shows up as multiple deficiencies. If you are having chlorosis and necrosis and pots aren't drying out properly you are overwatering. Are you feeding it, if not I would start hitting with veg nutes and cal-mag.

overfed if u've fed it

Hey, took a quick look at your grow log and I'm not sure but I think I see stuff starting on multiple plants. Tips on one is yellowing, other one is curling, could just be my eyes and the angles playing tricks. Either way, Let's have some fun: 1) Are you running organic amendments or using nutrients (bottled or powdered)? if organic skip to #4 2) what nutrients are you running and at what strength? 3) Are you watering every couple feeds, or feeding every time? 4) Are you adding cal-mag? 5) What light are you running? And if it is adjustable what power are you running it at? 6) What height is the light at above canopy? 7) How often are you watering, and is the soil drying out between waterings/feedings. Hopefully something there sticks out when you reply and we can try to get you back on track. Good luck.