- 1). Apply fertilizer to your large pecan trees in March.
- 2). Apply the following fertilizing formula to large trees: 1 pound of 13-13-13 fertilizer per tree every year for up to 25 years. Additionally, add 1 pound of ammonium nitrate and 1/10 pound of zinc sulfate per tree every year for up to 20 years. Finally, add 5 pounds of dolomitic lime per tree every year for up to 20 years. If the tree is young, add just half of the ammonium nitrate in April and the other half in June for the first three to five years.
- 3). Use a fertilizer sprayer to broadcast the fertilizer around the surface of the trees. Try to spray the fertilizer in a circle around the trees that is twice the branch spread of the tree. If you need to, use a measuring tape and measure from the trunk out to the last branch spread. Take note of that distance and double it. The doubled amount is the maximum distance away from the tree that you need to fertilize.
- 4). Water the area surrounding the tree normally. If you overwater, you may dilute the fertilizer.
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