Nick Maclaren wrote:
No, you need aubergines for that. Naubergines grow indifferently
until
autumn, when they produce an attractive flower or two, which drops
off.
Eventually the whole plant succumbs to the cold.

I took to going over mine with a paintbrush every few days. I don't
know whether it's just coincidence that the first fruits set a couple of
days after the first instance of manual pollination.

Rhiannon