The most important factor is to provide ample space as they may reach 70 feet across. Pecan trees also need plenty of sunshine for good production. Pecan trees perform best if planted in deep, fertile, slightly acidic soils. Our alkaline soils tend to cause problems, particularly with zinc deficiencies. Periodic foliar sprays of zinc sulfate may be required to maintain good growth.
Fertilization is a key factor too.
Pecan trees require ample nitrogen fertilizer for good production. If you decide you have the space to plant a few pecan trees, order up the proper variety for your location. When they arrive you may be surprised to find them in a strange container. Pecan trees develop a true taproot that requires protection throughout shipping and planting. Once severed, you can pretty much forget about nut production.