Canna being edible makes it onto my list to incorporate into the FF Garden.
They grow 4feet high and dense so they could offer protection to other plants.
I suspect they will like a lot of water.
I could even try cutting them for mulch? seeing as they are quite vigorous growers...
I like the "Edibility versus Palatability"... but good to know they can be eaten.
Will just have to do a taste test to identify the "better" tasting ones.