Originally Posted by cincinnana

The tent protection works well for tender rose canes.
In your zone and mine the ground freezes up to 8 inches deep rendering the tent ineffective for a banana plant.
If you were in a warmer zone like 7-9 it would be much more effective.

4 +bags of inexpensive mulch will work for insulation for your plant and your neighbors won't even know its there.
Looks like a small bump and is attractive the next season as mulch.

Here is a link of something similar that has been used in the past, further in the thread it was revealed it did not work as planned for the grow zone.
There are also some good DIY Youtube videos on building wraps and boxs for your plant if you want to proceed.

.Permanent banana shelter for winter and spring