Grafting pecan trees is an essential cultivation technique that has been used since the 1700s. Grafting involves using the root system of a wild or undesirable variety of pecan tree and combining it with a desirable, productive variety. The greatest advantage of this technique is the ability of farmers to change the variety without removing any trees.
Locate the tree that will be used as rootstock and cut the trunk cleanly back so that it stands 3 feet from the ground.
Obtain branches from the desired pecan tree variety and cut them cleanly from the tree with a grafting knife. The branches should be roughly 4-6 inches in length and taken from the tree's new growth.
Place the branch against the trunk of the rootstock and trace its width onto the tree with the grafting knife. Remove the traced bark from the rootstock.
Make a diagonal cut along the end of the branch, roughly 1 1/2 inches long.
Gently push the branch into the bark of the rootstock directly below where the bark was removed.
Wrap the entire graft tightly with grafting tape to hold it in place and cover it with grafting wax.
Remove the tape once new growth as formed on the tree. New growth typically forms within 6-8 weeks.