Blight in the GH...
My brother's toms in his GH got blight this yr whilst he was on his jollies. He's used an automatic watering system, spraying the plants and getting the leaves wet daily for a couple of weeks.
Am I right in thinking, firstly toms don't like having wet leaves and secondly by raising the humidity in the GH, an environment has been created in which blight would thrive?
He's cleared all the plants and wants to know if the bed's will need replacing with new soil?