Ah, I'm glad I asked, I would have been messing with the roots. On most plants I am pretty careful with the roots but I thought naner roots were pretty expendable. Hopefully it is good to trim off the dead roots, right?
Yeah, I am a mess figuring out where to put all my naners for winter, lol. (zone 7b ish, btw)
Seems like when we talk about hardiness it means for a large, well established inground plant.
I get kinda lost when factoring in having a small-ish pstem (although I feel it's corm size that really matters) and being in a pot, deciding how low they can go. If I had enough expendable plants, I would just do my own experimenting to know what a safe low temp is. I guess I will plan to bring the sikkii and mekong in the house until I have more pups to work with.
I have E.maurelii as well, you really can go that low with them?? Wow, I really baby my naners

I did score a new pop-up 5' greenhouse (plastic sheeting) this year, but I have no idea how much temp protection it will provide.