Site
Location is important because of the ultimate size of the tree. Plant trees well away from the residence and other buildings. Perhaps the biggest obstacle to be avoided is overhead power lines.
When selecting a site in the landscape, consider the eventual spread of the tree. Space the trees at least 60 to 80 feet apart so they will not become crowded as they reach maturity. Crowding can cause mis-shapened trees and decreased production in shaded areas. Unlike commercial situations, trees planted in the landscape should be spaced far enough apart so they will never need to be removed.
Do not plant low-growing, shade-tolerant shrubs under the pecan trees, as these will compete for moisture and nutrients. Ideal cover under a landscape tree would be some type of lawn grass suitable for that area
