(My apologies for the long delay in reply).
Sorry, but I have no idea where in Texas this plant grows. But if you click on the link in my first post above, it will take you to the main information page for this plant (which includes information about its hardiness zones). Then, scroll down beneath all the comments to the "Regional" section and it will show all the locations that users have reported the plant to have been been able to grow. There are several Texas locations listed.