The yellowing was probably caused by a combination of cold and overuse of incorrect fertilizers which is why a few leaves have died off. Once a leaf has died it begins to decompose, hence the spots - it's just a dying leaf. In autumn you'll see the same thing on many plants and trees before leaf drop.
Water droplets on the surface of a leaf cannot act as a magnifier and cause a burn, the droplet would have to hover just above the leaf to cause a burn. On rare occasions plants with very hairy leaves can manage to hold a droplet at just the right height to get burn.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Just want to thank you all for answers and advice again! Little update: all plants are doing well. I removed all yellow leaves and potted on in bigger pots ( deeper) . Looks like it's gonna be a good crop. In the pictures I have just cut of quite a lot of leavs to get circulation and light. Picture 1 the outdoor type " Bogus" four plants . Picture 2 "san Marzano " in the greenhouse. Have a lovely summer and enjoy your crops!
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Once a leaf has died it begins to decompose, hence the spots - it's just a dying leaf.
In autumn you'll see the same thing on many plants and trees before leaf drop.
Water droplets on the surface of a leaf cannot act as a magnifier and cause a burn, the droplet would have to hover just above the leaf to cause a burn. On rare occasions plants with very hairy leaves can manage to hold a droplet at just the right height to get burn.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.