I have just pulled up the last of my tomato plants, heavy with fruit but again, for the third year running, plagued with blight. It is so depressing. Before all this I grew wonderful tomatoes each year which yielded so much fruit that I had to preserve them in olive oil for the winter. I don't know what I am doing wrong. This year I tried them in a greenhouse for the first time but the same thing happened again. I grow them in growbags so it is not to do with using infected pots. Does anyone have any suggestions?