Blue flag Louisiana iris are about bullet proof, but they will spread and are hard to contain. Pickerel will produce seed and establish from seed anywhere they can. I consider that a good thing. You may not. For water lilies, try the common white Nymphaea odorata. I have fought trying to establish a number of lilies, but the common white one is finally taking off. Again, they will spread to 4-6 feet of water.
Last edited by RossC; 10/07/24 04:45 PM.