Brandywine Heirloom tomato leaf/flowering issue
I am a backyard organic gardener and new to gardening. I've planted several tomato plants which appear to be coming along. However today, the brandy wine which is about 3' high caged, is suffering with yellow spots on its leaves. I can't see any flowers either. It was a transplant that went in the garden around May 20th. Any ideas how to treat? Thank you!
Interesting picture--does not appear to be Septoria--a fungal problem. More likely due to nutrient deficiency or watering issue. https://www.offthegridnews.com/survival-gardening-2/what-to-do-when-your-tomato-leaves-turn-yellow-and-the-plant-starts-dying/
Consider a soil test http://soiltest.cfans.umn.edu/
I do not know how you define organic gardening. Pesticides and herbicides are obviously out but 'organic' fertilizers are often very low in nutrients. Be aggressive in remedying this-time counts.
I hope this helps.