From Ann Lyons
I have had to grow blight resistant potatoes and tomatoes, since moving to the Dengie. Even so if I do not lift the Sarpo Mira potatoes before the end of August they suffer late blight which causes the tubers to develop a black ring inside. The tomatoes suddenly get blight about the same time and all fruit is lost. Despite the manufacturers saying the seeds have outstanding blight resistance. Also the onion sets develop a fungus- which causes the leaves to mottle and growth stops.
Have any members any ideas how to grow these veg successfully?