Then that would be a good place to try the LA then !!
...Seriously though, I was told that for the "water loving" iris, a method to use might be to bury a large ,plastic pan (with sides about 4"-6" high), about 6"-8" deep, under the iris. Theory being, the pan would "hold" the water, and keep it from moving downward. Thus ,the plant would be growing in saturated soil. I think I may try this, as our soil is VERY sandy and porous , and doesn't hold moisture well( which makes it ideal for the bearded, but for LA's and JI's, not so much !). Not sure how well this will work, but I'll never know till I try !
...Arlyn