JoeReal

But for now, don't remove any leaves, do not cut back to the ground or whatever, just let them be. You would need all the mass and organic covers to protect them from the winter. Come spring time, tell him to thin it out by cutting to the ground redundant sized pups, leaving only a maximum of about 4 per clump.

But of course, if that is the way he simply likes his banana clumps, there is not much we can do about it. Depends really on his objectives of having bananas in his yard, and I truly respect that for anyone that may have different growing objectives than me.