A most unusual, hard-to-find, Begonia for the plantsman. Needs frost proof protection in winter.  Keep your plant in some dappled shade and it would benefit from being outside in summer.  They can't take frost but they don't like being in direct sun, either. Over-winter it in a frost-free greenhouse and when watering make sure to let it drain really well, keeping it only just moist both winter and summer.  It will need less watering in winter, obviously.  If it needs re-potting later we suggest a half and half mixture of a coarse, free-draining compost with a peaty one for nourishment. 2 litre pot