I have not, Michael, but your idea makes sense to me. Insofar as I've ever seen, cannas are native to Amazonia, a region rich in saturated environments I should think. At any rate, seems well worth a try.

Perhaps you could only try this w/ some of them & put the others in drier containers to hedge your bet...?

I think it will work fine but carols advice to have a backup planting is sound, until you see for yourself whether it works or not.

Michael, around the trail by my house there is a lake and they planted thousands of cannas few years ago, they do great over there, they are yellow and most of the time when it rains they are under water, like now they are like half and half.

Silvia

Hi

For me I've had much better luck with canna in the shallow marsh garden than other methods .When it was in full sun they really grew well . I grow them in pots with the upper half emerged from the water in either pea gravel or turface this is sterile of course so use fert spikes .Rich soil results in rich algae growth Since the canopy has matured resulting in dense shade I've mostly converted it to spathiphyllum,calathea ,sword plants but still have one hybrid canna there which is suffering. though it still grows even flowers.

A big problem was leaf rollers, so mostly converted to heliconia for those grown in regular soil or pots .They are not bothered by insects but requires careful selection of varieties as some get really gigantic

I found a whole bunch of different types of plants did very well in what I call a "Marsh" area due to the water being under a foot as opposed to a "water" garden over two feet in depth There is another type called a "bog" characterized by very acidic conditions great for pitcher plants sundews IF you can locate tropical varieties?? Some that most surprised me were angelonia , Impatiens they went crazy lol as long as the water was very shallow. they grew twice as big as those grown in the regular way!!

I would recommend the method for cannas IF you can provide enough sun??

and control the leaf rollers?? Good luck gary