I found by accident by plant the Ears next to a down spout by the house that they love the water and have flourished where they are at. I also transferred some iris still in the 5 gallon pots and placed them in the pond in a few locations. I I move them every couple of months they don't seem to get their root attached to the bottom even though they have since outgrown the pots and I am able to control their spread and have beautiful yellow blooms this year. Just a couple of thoughts.

Bob