Micronutrients

Sources

Iron (Fe)

·         Iron chelates (Fe-EDTA, Fe-DTPA, Fe-EDDHA – preferred in hydroponics)

·         Ferrous sulfate (FeSO₄ – less stable in solution)

Manganese (Mn)

·         Manganese sulfate (MnSO₄·H₂O)

Zinc (Zn)

·         Zinc sulfate (ZnSO₄·7H₂O)

Copper (Cu)

·         Copper sulfate (CuSO₄·5H₂O)

Boron (B)

·         Boric acid (H₃BO₃)

·         Borax (Na₂B₄O₇·10H₂O)

Molybdenum (Mo)

·         Ammonium molybdate ((NH₄)₆Mo₇O₂₄·4H₂O)

·         Sodium molybdate (Na₂MoO₄·2H₂O)

Chlorine (Cl)

·         Usually sufficient from irrigation water; additional supplementation rarely needed.