Four square metres, kept badly and recorded carefully.
The frame held all season. I had braced it twice after last year and was pleased with myself about it. In the second week of October the plants on the western side went brown from the top down while everything two feet to the east stayed green.
It was not the frame. It was the gap between the shed and the fence, which funnels every westerly straight onto that corner. I had walked past that gap for two years without once thinking of it as a feature of the garden.
The yield was about half of last year. Not a disaster, but an avoidable loss, which is the annoying kind.