It's been raining for weeks it seems and I'm worried that the problem I had last year with septoria leaf spot on my tomatoes will return. I've amended the soil and it's good and rich so the plants are growing well. I'd prefer to start with something organic and not resort to chemical controls unless I have to.
In your experience, what actually works? I've read lots of advice but then see the rebutals saying things like milk or cornmeal don't actually work. I'd like to prevent the problem if I can, rather than treat it once it shows up. Help!