Sorry, here's the pictures..Toni

Here is a link that might be useful: RE: Do I decapitate?

Well, I'd wait till it's cooler. They can take down to near freezing. Why make them suffer any longer than they have to. Course then, maybe you could just dig up the pups and leave the big one to compost the rest.
Though the banana forum is filled with people in your zone, you might get better info.

Thanks Heathen..The Musas are so pretty so I hate killing them..both do have pups..the problem is space..they'll be going in a small 8x12' gh, but I've also 20+ citrus, hibisucs, gingers, and a few others that has to fit. It's going to be a tight fit..I've over 400 houseplants so my house too is crowded. Last year I kept the Cavendish in the house, but it was 1/3 the size it is now.
Most of the ppl in the banana forum who grow them usally grow hardy inedible bananas. Basjoo..But I'll give it a try..Toni

My hort teacher used to let the foliage die down after the first few frost,cut them back,and ball and burlap them.H ewould keep them that way in hi sshed or garge in zone 7 all winter.It is probable that it is mosture,rather than the cold that does the killing,when it is cold.He also potted some up and brought them to the green house for the winter.They are VERY difficult to give adequate light indoors.One would bnee to use grow lights.I had a dwarf musa as a hous eplant and watched it slowly decline,due to lack of light.best of luck with them Toni.

NO, NO, NO. Dig them up and put them in the basement for the winter. I put mine in small pots with just enough dirt to cover the roots. Don't water - check them at Christmas time to make sure the roots are not getting dry - mist them if you want to. Next June plant them out in the yard again. They will grow from that height. If you cut them off, you will have to start all over again - you won't gain any height next year. If you leave them out, changes are they will freeze - it not, you will still lose most of your height.

Lemon and Kay..the problem w/is 1.there isn't much light, but worse, it's freeing there in winter? Won't the roots freeze? I'm confused..There are seveal pups from each plant so I was thinking of trying to save those..Yep, I know it'll be like starting over if I cut back, but I don't kow what else to do. And it's getting colder nightly. I don't want them to freezze..
The basement gets very little light, too. There's only 6 small windows that don't offer much light. What to do? Thanks for your advice though..Toni

A few thoughts for you~
If you store them dormant, you don't want it freezing, and you also do NOT need light. Also, I believe the roots actually die after digging, so you do not need to try to save them/keep moist. You are trying to save the corm, which will regrow roots later.
The plant on the left looks like Musella lasiocarpa?? I am not sure you can cut that one back. Other bananas can be cut back.
I would try to save a pup or two and grow them in the GH or house, and then pot up or burlap the mother and keep her cool and dark.

seahorse

Seahorse, I have a small gh so I think after I dig them up they're going in there..there are quite a few pups on both plants so even if I have to cut the tops I'll still have the pups..
I don' t have a Musella but for the life of me can't recall its name but it's definatly a Musa..I'm going to try saving them however..I learned a lesson..next summer they're staying in pots..lol..if we had longer summers and milder winters, it'd be different, but living in IL and growing tropicals is quite a feat. Thanks for the info though..Toni