I have a small Banana Plant (indoor). Over the summer it was very healthy,
new shoots, leaves and a thick stem, however, some small shoots have opened
in the soil at the bottom of the plant. Now it's winter and the once healthy
thick stem (trunk) has got very thin. Does anyone know what I need to do to
get it healthy again? Or is this something that happens in the winter?

Any help would be great!

Best Regards

Tim