I have Yellow Water Iris's and I really like them. Here is what I have observed. They will eventually crowd out Cattails. My Musk rats come in every few years and clean out my cattails but won't eat the Water Iris's. The original plantings are now big and thick and should be devided, but they some how spread around the pond on the far sides by them selves. They will grow in the water a foot or two deep and they will grow out of the water three or four feet up the bank. They are keepers. They also come in white and purple.

John