Thank you, Roger. If I could save the plants for next year that would be fine. What do I do to get them to survive the winter here where it can drop to minus 30 C? When it is very cold outside it freezes on my balcony too. I could take them inside my flat 1 December which is when I give up trying to save my tomato plants and anything else I have on my balcony. It also gets dark at 2.30 p.m. The light returns slowly after 23 December. In March it is light enough to sow seeds inside.
Now that I am retired I can look after my houseplants properly