Your Brugs are just wonderful, Louise!
I agree with Jonna, the size of the pot is going to determine a lot.
I wish I could give you a definite answer on the cold hardiness of your plants, but it completely varies by species. There are some that can take snow, but some of the ones from Central America can suffer damage even here in the blast furnace. When working with them you might want to think in terms of micro-climate and your ability to keep them warm on cooler nights. A lot of them can be covered (with anything but plastic, unless you can keep it above the leaves), if you suspect your covering is too light - like a sheet - put a light bulb in with it (wow, that's going to be an issue with the loss of incandescent lights, huh?) like the ones at the end of an extension cord. You used to be able to use Christmas lights, but they are typically going to LED which is no help.
If it were mine, I'd pot up one of the pups this spring and let it establish, then try it as an experiment next spring.
If you like the A. macrocantha at all, I will send you one in exchange, Louise. Or something else you like, just let me know. I know you're carting a lot of stuff indoors right now, so I don't want to add to that!
