Hey I am unsure if this is nute burn or light stress/burn. I recently went heavy on the nutes so I am leaning towards nute burn and doing a flush, however I have seem some pics of light burn that look similar?
She is 4 weeks in veg, 2000 SpiderFarmer light that is about 15" away. Runoff PH is low but I'm working on it (top fed the soil with lime).