It’s always challenging to find woody plants that can be grown in pots and left outdoors during freezing weather, but junipers work. They’re hardy clear to the northern states, so they’ll have no challenges in Texas as long as you keep them watered.
This one is in a side yard at our house. It wasn’t labeled when I bought it, so I can only guess as to the variety, but it’s performed heroically in this small setting. Its blue-green needles are a pleasant contrast to summer flowers, but in the winter, it steals the show. Junipers are among my best go-to plants anytime I want something that takes all the Texas weather and still looks great.