Pecan IPM Toolbox
Horticultural Practices
When to Apply Nitrogen
The initial nitrogen fertilizer application should be applied at bud swell, immediately before pecan tree growth begins. If a split application is made, one-half of the rates from the previous table is initially applied and the other half applied 7-9 weeks later.
Split applications are made to reduce nitrogen loss due to leaching, volatilization, etc. before the trees can utilize it. Soil type, weather conditions, type of fertilizer used, etc. affect this and local expertise (and regular leaf analyses) should be consulted to ensure maximum benefits are being realized. Note that over-fertilization can result in excessive vegetative growth and increase susceptibility to aphids and other pests.
Next: Weeds and Nitrogen