Designated the Texas state tree in 1919, the pecan tree is a perfect shade tree for your Texas residence. Reaching a height of about 60 to 80 feet at maturity, this tree should definitely be given plenty of room to grow. it produces the popular pecan nut, and can live and produce for up to 1000 years. Fun facts, the pecan was an important food staple of the Native Americans, used in a variety of ways, including salads and “energy drinks”.