Last year I sent away for some Begonia tubers and was very pleased with the display of the blooms. I have one tuber that is 6 inches long and 4 inches wide. Is it possible to cut it in half to make two? They are already stored for the winter.
Certified GKH Gardening Expert
As this article explains, it is difficult to divide begonia tubers successfully, and a more reliable method is to make cuttings when the plant is growing: