Hey bumplbea! I don't think I have a picture of Escargo in the database, but I did post other rexes. There is one from the Philadelphia Flower show that is similar, Begonia longiciliata?
Anyway, Escargo and rexes with that leaf texture are short lived here, indoors and out.
I do take the whole plant indoors. Most types with fleshier leaves do OK for most of the winter but then start dying back before spring, only to get kicked out of the house and recover again. But I don't have the shade anymore to support their summer recoveries