Pecans grow from deciduous trees which can grow up to 130 feet tall. The flowers on these trees are completely wind-pollinated and the leaves usually grow anywhere from 12 to 18 inches in length. This type of nut tree is actually one of the most recently domesticated major crops, starting in the 1880s. Even though the commercial pecan business has been booming for quite some time, wild pecans have been enjoyed by lots of people for far longer than that, considered to be a delicacy by many. Some of the leading pecan growing states in the U.S include New Mexico, Texas, and Georgia. Pecan trees are able to grow so well in these states because they need full sunlight and the right type of soil to grow properly.