I am 99.9% sure my tomatoes have septoria leaf spot. I went to home depot today and the product they recommended is scary to say the least. I have been researching organic treatments for this disease like crazy and can't seem to find the product I need (copper hydroxide) in a small home garden quantity. Does anyone know of a way for me to fix this without dumping horrendously toxic chemicals into my soil?
Please help me! All 14 of my tomato plants are infected and dying!