some times blight on your tomatoes can be caused by too much rain. if they are not covered then try covering them and cutting picking all the blight parts off.
welcome to the forum.I live in a generally wet climate with high humidity and rain,I have to keep my plants under a cover or they die because of blight.
welcome to the forum.I live in a generally wet climate with high humidity and rain,I have to keep my plants under a cover or they die because of blight.