Zinc sulfate monohydrate powder contains 35.5% zinc (Zn), including 35.5% water-soluble zinc, and 17% sulfur (S). It is suitable for use as a foliar spray; however, caution is advised due to the risk of leaf burn or fruit marking. For tree crops, application during the fall is preferred. This product is harmful if ingested, causes severe eye damage, and is highly toxic to aquatic organisms with long-lasting effects. Handle with care.