Hello Discodave and ThaiGer, thank you for your replies. We got the plant as a gift when we bought some bulbs and other stuff, and no information came with it, so I don't know what it's botanical name is. The plant is in a porch, which is not heated but sheltered, with no draughts, it's never been outside. The fruit (all one of it!) has been there about 9 months, so we could leave it longer, there were lots of flowers, but they all dropped off and there are no flowers now.
are you using tepid water now its cooler and letting it dry off somewhat before watering?
We haven't done this, but should we do this in the cold weather?
Thank you again for advice,