Day 120- Flowering day 20- Fed this girl with 1.5L of nutrient solution; it was a little too much but she recovered quickly. The Big Bud Coco finally showed up along with some extra hangers so I could raise my lights. I also put this girl in the 3x3 tent and put the other girls in the 5x5 since I’m gonna build a scrog net frame for them anyway.
I believe this is potassium deficiency.
K deficiency causes internal temps of foliage to rise and it causes the protein in the cells to burn and degrade. Usually happens on the edges of the leaves.