Balcony - Indoor Summer 25

Looks like calcium deficiency. Possibly Mg-def but not necessarily both. hate to perpetuate a false narrative about "cal-mag" A lot of 'base' fertilizers don't have ca in it... it's a complicated molecule to include with high concentrations of other nutrient elements. e.g. it'd potentially form insoluble gypsum with sulfur etc.. So, if you don't have another fertilizer component adding plenty of Ca or garden lime amended into soil etc... probably Ca deficiency. the chlorosis seems to just be around the rust spots... if it ends up being interveinal, Mg-deficiency is more likely. From what i see looks more like a halo effect around the damage.

Skewed pH, Alkaline, above pH 7. Iron likes to bind with P, making it unavailable for chlorophyll replenishment; other micronutrients are also unable to uptake, also looks like possibly necrotic spots from possibly oversaturated medium. (Potential lack of oxygen in waterlogged soil, causing signs of hypoxia) Waterlogging especially screws with Iron and how it converts and binds in a medium, either causing deficiency or toxicity depending on blah blah dose yada yada.

NPK def the plant eats itself let it be if u're gonna harvest it in 2-3 weeks also looks like spider mite's dots on the fans