Having some issues with brown spots on leaves at top of canopy. You can see the issues on Day 43-45 leave shots. I am thinking its either Cal/Mag or Potassium deficiency?
Water pH 5.8, 1150PPM. 14ml/gal canna coco A, 14ml/gal canna coco B, 5ml/gal calmag plus, 8ml/gal big bud.
Open
Leaves. Edges burnt
Leaves. Tips - Burnt