Brown blotches fanleaves

What kind of nuts and that al ml in how many liters? If u have set 12/12 h of light u can start use half and half grow and bloom nuts to give also the right ammount of P and K that now she needs Don’t go over 1/2 recomended dose 😊✌️🏽 Maybe start to ph- your water if u haven’t do that already high ph can cause a little bit of struggle to uptake the micronutrient for the plants and show some rust spots on the upper leaves