Print or PDF Fertilizing Backyard Fruit Trees Teryl Roper, USU Extension Fruit and Nut Specialist, says that spring is the best time to fertilize fruit trees.  For the most part, fruit trees only require additions of nitrogen.  With the exception of iron, fruit trees generally don’t require micronutrients.  The amount of fertilizer to add can … Continue reading Backyard: Fertilizing Fruit Trees, IPM Resources