@nminusyplusm I love your banana tree! I have one that was about 3 feet tall last fall. Silly cats broke it off at the bulb so I babied it back into sprouting again. Right now it's a little over 2 feet tall but it's sitting up so the cats cant get at it again.
Concerning clay soil. We have been crumbling dry wall left over from building projects and sprinkling it on the garden and yard. When we planted our orchard the people at Starke's told us to plant a chunk of dry wall with each tree. Our soil here is VERY rich in clay with a thin layer of rich top soil on top. We planted our orchard over an old corral. There is at least a foot of top soil before you hit clay but we still dropped dry wall in with each new tree.
Don't get me started on ponds.

We have two natural ponds on our property and a small lagoon behind our barn that is just begging to be turned into a pond. When we bought our farm it was being used to water livestock. We cleaned it out and once clean, it began to loose water. We have left it alone and we have began to see it once again start to hold water but I'm considering dropping a tarp liner in it (there is a tarp manufacturer near us) and then letting the fun began doing landscaping around it. I've created three ponds in the past. This one would be more of a habitat type of pond for frog and the like.