I would identify some wild arrowhead and blue flag iris in your area and ask the land owner if you could have a few and randomly plant them. I bought some lizard\'s tail and hardy water lilies. I put the lilies in cloth pots on a 2' deep pea gravel shelf I have. I had bulrush, spikerush, another slow growing plant I haven't identified, water milfoil, and cattails coming up on their own. I pull the cattails and some of the milfoil. This is just what I've done, but someone correct me if I'm wrong.