- Getting rid of tomato diseases in the off-season?
My tomatoes have varying degrees of early blight and septoria. I believe that both of these problems can overwinter, either in the soil, or on weeds, or on plant waste. How can I ensure that these problems plaguing me this year don't return next year? I am considering soil solarization, But I am in zone 5 and will be running out of time for this very soon and it has already been a relatively cool summer here. I have a rather large garden, so crop rotation will be practiced. I have already treated this year's plants with copper, but I don't want to overdo it, since it has been suggested that too many copper treatments can build up in the soil and cause other problems. Any suggestions?