I live in Kelso, WA 48 miles north of Portland and I have Basjoos outside the mat of 10 adult ones and five pups is probably six to eight feet around if I drew a circle around them. I didn't do anything to them for the last couple of years over the winter and they did just fine.
If your plant isn't that big when winter comes my aunt and uncle both have them and they wrapped them in bubble wrap to over winter them. So you could have everyone save their bubble wrap over the summer.
Happy planting.
