First Grow: BCN Critical XXL

@Harmar, thanks for your helpful comments👍 I bought some magnesium sulfate at my local pharmacy yesterday and applied it as foliar spray (2% solution clocking in at 600ppm) to the fan leaves. I also added a tiny amount of dish soap to lower the surface tension of the spray. I also got my hands on an EC-tester which showed that my feeding solution for the last 3 weeks had around 1200ppm😳. Considering it is a 8-5-8 fertilizer, a magnesium lockout due to nitrogen or potassium excess makes perfect sense.😏

@autoseedsman, thanks for your kind words😀

@PurposeGround, Thanks for your comment and bringing mg (You mean magnesium i suppose?) to my attention. Today, while i was inspecting the canopy from the underside, i spotted 3 upper fan leaves which showed little dark spots all over them while looking through them against the light. I didn´t notice it beforehand because these spots are hardly to see normaly. They show as faint "rusty" (For lack of a better term) spots on the upper side of the leaf. I read rusty spots can come from rust fungus (Ruling that out, cause there are no spores to rub off) or from Mg and CA deficiency. My fertilizer has 0,2% MgO in it. I also see a light clawing up of many of the other upper leaves. Maybe a lockout due to nitrogen toxicity? I will follow up with another question and pictures if time allows it.