One reason begonias are so popular is because they're ridiculously easy to propagate. When I was a kid, I was introduced to begonias when my mother brought home a leaf that a woman in her bridge club had given her. I already knew how to propagate african violets from leaf cuttings, and this woman told my mother that begonias could be propagated the same way. It worked, and I was hooked. I've since discovered that most begonias can be propagated from leaf cuttings. About the only ones that can't are cane or "angelwing" begonias, which have to be propagated by division or stem cuttings.
