Midland and Odessa have a great group of Texas Master Gardeners. They hosted the State Conference this last September and there were many of them that showed off how they have mastered the challenges of growing flowers and veggies in the grueling summer. I would suggest contacting them. Permian Basin Master Gardeners or the Texas AgriLife Extension Office there locally. It can be done, my aunt also lives in Midland so I know how tough the weather extremes are both winter and summer.