ferti•lome Fruit Citrus and Pecan Tree Food 19-10-5 is a nutrient-rich fertilizer formulated to support tree growth and productivity. It contains a special blend of essential plant nutrients and a generous supply of zinc to help control rosette in pecan trees. Suitable for all types of nut, citrus, and fruit trees, it should be applied twice a year at the recommended rates around the drip line and watered in thoroughly for best results.