The American Begonia Society maintains a terrific website packed with information about begonias.
Begonias are flowering perennial plants. The begonia genus is huge, with more than 1,700 plant species. Begonias originated in the understory of tropical and subtropical forests, although they have been cultivated as house ad garden plants for decades. If your grandmother had a garden and liked flowers, she probably has a begonia growing.
Indulge your love of begonias at the American Begonia Society website.