Magnesium Deficiency, not early blight or septoria
I have been trying to investigate this problem and I may have figured something out. While it may be Septoria, or even early Blight. I have been working hard at allowing enough ventilation.
At the suggestion of an answer on another listserv, they suggested a deficiency. Then I read about Magnesium.
I think I may have an answer. I am going to still spray for fungus, but I will also at some magnesium. 1 tablespoon per plant.
Compare that to
What do you think?