FWIW, while I wouldn't do it with other begonias, I've grown the Dragon Wing begonias in all day full sun in baskets hanging over a hot paved area and they've been fine, and another planting in almost full shade. They get a little stretchy in the full shade but do OK, and are fine in all day sun so should work in a combo of the two. If you expose them to too much sun straight from a greenhouse they may get red tinges on the foliage but they soon get over that. Temperatures in the shade here can be in the 90s F in the summer months.
