Genus of about 1300 species and numerous cultivars of annuals, herbaceus perennials, shrubs and climbers, including some succulents and epiphytes. The estimated number of Begonia hybrids is between 1000 and 2000. Botanically there are three basic groups, depending on the nature of the underground portion. The Rhisomatous group bear thickened underground stems which are used for propagation - the members of this group are generally grown for their attractive foliage and Begonia Rex belongs here. The Tuberous Group have thickened roots which are used for propagation - here you will find the large-flowered types. Finally there is the Fibrous-rooted Group with ordinary roots which are not used for propagation - the well-known Wax Begonia (Begonia semperflorens) belongs here.
Average warmth - minimum 55 F in winter. Avoid temperatures above 70 F. A bright light - away from direct sun. Grow in a light, well-drained, peat- or soil-based potting mix.
Water freely from spring to autumn - sparingly in winter. Misting is necessary.
Take stems cuttings in summer. Seeds sown in spring at 70F germinate quickly.
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