AWB's prefer indirect sunlight indoors and partially shaded location when grown outdoors. They will not tolerate direct sun, full shade or breezy locations.
Since they are tropical plants, angel wings thrive on humidity. Keep the soil moist, but not soggy, more like a damp sponge at all times. A light mist of water each day or taking a potted begonia into the bathroom with you at shower time to bask in the humidity will encourage blooming.
During the active growing
through fall) keep the plant fed with a steady diet of water soluble plant food mixed at one-fourth the recommended rate. As the plant grows, don't be in a rush to re-pot it as begonias bloom their best when they are slightly root bound.
In the winter keep them away from the heat vents,, Dry air can harm a plant and bring spider mites,