Great advice, I had little problems with tree fertilization, this helped me.

Mar 23, Mature peach trees mostly require nitrogen (N) and potassium (K), the two nutrients found at higher concentrations in fruits. Phosphorus encourages root development and is essential for young trees.

Use a complete fertilizer, such as, When to Fertilize Peach Trees In nutrient-rich soil (determined by a soil test), there is no need to fertilize until your peach trees begin bearing fruit (average: years). If your new peach trees fail to put on an average of 8 to 12 inches of new green growth during the growing season, consider fertilizing the following spring.

Jun 08, Fertilizing Peach Trees Peach trees (Prunus persica) are hardy in U.S. Department of Agriculture plant hardiness zones 5 through 9. Like many fruit trees, peaches.