Don't say I didn't warn you!
Bags are 3 mil contractor bags, filled with leaves that the thoughtful neighbors left on the side of the street for me. One hole in the bottom of the bag, one hole in the top, no hole in the top of the top bag.
Musa itinerans var. itinerans
From left to right:
M. itinerans,
M. sikkimensis 'Red Tiger',
M. 'Helen's Hybrid'.
Total cost = Whatever I paid for 30, 42 gallon contractor bags (on sale) at Home Depot (I forgot how much they were). And it is effective! I've been using this method for years.