how much shade can it tolerate?
I have a corner garden which has an arc as its front border.
For the past several years I have used only shade or only New Guinea Impatiens for the border (along the arc) but this past summer I saw (in other people's gardens) more impressive borders consisting of some.... (semperflorens?) begonia. I would love to make the jump to this next summer but my border experiences varying amounts of sun ie from shade to dappled sun to part sun.
How much shade can such begonias tolerate and flourish?