Hello my friend, this is just a color mutation that you find very often on cannabis plants. This is not a problem or deficiency. So no worries and enjoy this grow buddy! π
Looks like lack of phosphorus.i am doubting is it potash, but potash goes more black colour of necrosis, this reminds me of phosphorus, they entered flowering ?
@TheFamilyShire, i have only one dog and it dont even come to growroom. Still have lot of hairs :) its nit thst big deal at the end. Take those of or smoke. Second option doesnt taste that good π