Soluble fertilizer for foliar use. Iron and Zinc are two of the most important micronutrients in the nutrition of fruit trees and vegetables. Many times, due to chemical conditions of the soil, these nutrients are precipitated in the soil and cannot be used by the plant roots. Iron and zinc EDTA chelates are stable chemical forms that are absorbed by the leaf lamina and are mainly used for photosynthesis, shoot growth, flowering and fruit set. The addition of potassium nitrate significantly improves the levels of absorption of these nutrients via foliar, "This product is within the category of plant nutrients and is not classified as toxic according to NMX-R-019-SCIFI-2011. Read the safety data sheet carefully before using this product."