I was hoping someone from north Texas might offer advice. I am in Indiana, so things that work for me might not work for you. I pull all cattails as they are very invasive. I add giant bur-reed as a replacement with higher wildlife value. I also like spike rushes (various types). Pickerel weed is a nice blooming plant, along with blue flag and lizard's tail. I just am not sure how well any of these do in Texas.