Do you think these are perennial?
This Begonia was ALL over this country club where I went to a wedding this past weekend near Warner Robins, GA, Z8. Mostly in huge concrete planters and spaces bordered by brick patios and walkways, so micro-climate could be a factor. There was also a large pond nearby. Looks kind of like really big wax Begonias with less rounded, more oblong leaves. Two to 3 feet tall, huge patches of canes with just a few leaves and tons of flowers at the tops. If they aren't perennialized there, someone planted thousands of these everywhere throughout the grounds.