The pecan tree (Carya illinoensis) was designated the official state tree of Texas in 1919. The pecan can survive more than a thousand years and grow over 100 feet tall. Proper attention to cultural requirements and pest control will help to assure a long and productive life for home pecan trees. The tree is popular for landscaping and as a source of nuts. When Planting the Pecan Tree the size is important; avoid trees smaller than 4 feet tall, and more than 8 feet tall. Pecans are damaged by several insect and disease pests and control measures usually are necessary to mature a good crop. Pecans are mature and ready to harvest anytime after the shuck begins to open. It is easier to wait and harvest nuts by shaking or thrashing branches after shucks are wide open and partially dried. However, the longer you wait, the more pecans that may be lost to predators. Squirrels, crows, blue jays, wild turkeys, raccoon’s and deer all can cause serious yield reduction.