I apologize for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
That plant is not dependably hardy in your area. While it can take a light freeze with only minor damage a normal winter in Denton will usually kill it. Try scratching the bark near the base to see if there is any green underneath or even a healthy cream color, or if it is just dead brown.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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