Mg Mn P K deficiency?

If the problem starts at the top of the plant it’s an immobile nutrient deficiency. If the problem starts at the bottom it’s a mobile nutrient deficiency. Immobile nutrients are often referred to as micro nutrients and mobile nutrients are sometimes referred to as macro nutrients. Light and heat over saturation can often be mistaken for deficiencies so be sure to check that off the list before making any drastic changes. Once you figure out where the issue is coming from you can address it. Many times immobile nutrient deficiency is due to improper VPD and not a lack of nutrient in the growing medium. Foliar feeding can be a great way of administering micro (immobile nutrients). Mobile / macro nutrients = Nitrogen, Phosphorus, Potassium (NPK) Immobile / micro nutrients = Calcium, Magnesium, Iron, Sulphur, Manganese, etc. That's N deficiency by the looks of it. Remove yellowed leaves & either use Nitrogen soluble solution to help boost your nitrogen. I use Bio-BiZZ Bio-Grow. Foliar spraying wont resolve the deficiency as it's a "Mobile Deficiency" [ you can add worm castings or organic NPK fertilizer for slow release. Foliar feed = ONLY MICRO NUTRIENTS Best of luck mr