Thanks to eveyone who has shown an interest in this. For now, I'm ruling out compost problems, all my toms are in the same stuff, anly some are affected. Weedkiller damage is possible. My neighbour uses glyphosate under his electric fences, but he's a long way away, I don't think he has sprayed yet,...

Hi Essexboy Thanks for your reply. In a way I hope you're right, especially about the recovery bit. My worst affected plants are directly beneath the opening lights, I don't know what significance that has. Perhaps some shading like painting the roof with coolglass, and regular damping down in hot s...

My greenhouse tomatoes are about 4ft tall, and have 5-6 trusses on them. The lower trusses have set well, and the fruit is growing. The tips of the leader shoot leaves are going brown, and the whole shoot then withers. I have let the side shoots on the top leaf axils develop to replace the leader, b...