I have a question. 3 flowers didn't get enough nutrients and the leaves turned brown like this. Should I wash them? I'm growing them in cocos for

Hey pal. Grows are looking pretty good imo. I do see what you're talking about. What is that, staining from a spill. Yes, wipe them down and it'll be blocking the stomata vents. Also, make sure you have good ventilation + airflow.. There's a lot of mass in that tent. Bud rot can easily set in. Make sure to rotate plants if your tent as an area of lesser ventilation that the rest. It's also good practice rotation of plants under static lights. Every day or 2 just swap them around. Try to pour lower below any bud sites. If they get wet. They'll rot. Ventilation is key. They look awesome I have to say. Some healthy bud sites there very well formed gonna be some dense Good luck

Leafs look to have white residue, id be more concerned about that. Have you been spraying anything on leaves? Moisture bubbles are released under each leaf everynight as part of cellular respiration. That moisture bubble will remain under each leaf at which point all production will cease within that leaf until air comes and whisks that moisture bubble away. If left all night that moisture bubble will eventually evaporate leaving a white residue on leafs very similar to what I'm seeing. Either that you got mould or fungus.

More than likely part of the natural senescence of the plant. Nutrient redistribution during the mid/late stage is normal. In a perfect world I'd want it to cannabilize everything but bud by the end.