I bought a lot of trailing begonia plugs this year and the display has been simply amazing.

I understand that begonias can be overwintered if they are the type which grow from tubers, but I don't know which type mine are.

The variety is called 'Orange Sparkle' and I have posted a picture of what I hope is a tuber on my Picassa web album.

Please could somebody tell me if the hard, pink nobbly thing at the bottom of the stems is a tuber?

https://picasaweb.google.com/1130453...8356 74669954

TIA