Posted: 16/11/2015 at 21:52
I'm sure lots won't agree with me on this but it worked for me last year. I cut the stalks of the begonias while they're in the ground/pot. Lift the corms, take as much soil of them as I can and stick them in new dry compost and put them in the garage over winter. As soon as it starts getting warmer next year, I'll take them out of the garage, leave them in a very sheltered place and then put them in the places I want them as soon as they start growing.