If its coco than I would say Calcium, if its soil than probably lockout... can you provide more info about your grow?Hey for about a week now my plants have been showing brown spots on their leaves. They are appearing on older and bigger fan leaves only . Surely someone here is familiar with this presentation and can school me on what’s going on? My plants are currently on day 36 of flower.View attachment 4799872View attachment 4799873View attachment 4799874View attachment 4799875View attachment 4799876View attachment 4799877