Advice on which natives to plant

Hey y’all! I’m new to the community and looking for advice. I recently bought a house in central Austin and am looking to plant some natives in the backyard.

The previous owners added a flower bed around the back patio and planted (what I think are) a few natives. The turk’s cap and Texas ebony are thriving, but the canna tropicanna is struggling. We moved in about two months and it was blooming, but pretty quickly started looking sick. I hadn’t touched it so I’m not sure what exactly started it. I took the advice of my grandma and sprayed it with a baking soda and water mixture once a week for a month and saw no improvement. If anything, I’m just cutting away more and more dead leaves each week (picture is from today).

At this point I’m ready to tear it out and plant something else. What other native plants would you recommend? I’m looking for something of a similar size that grows fairly vertical, or at least doesn’t spread a ton. The area I’d be planting is about 2.5 x 6 feet. Any advice on what to plant and how to plant would be appreciated!

Bonus question- any recommendations for native plants or fruit trees/plants that would thrive in large pots? Hoping to plant a few more things when October rolls around.

Thanks y’all!