Fertilizers

The 5 headings of chapter 31

• 3101: Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products (1 code, General duty Free)
• 3102: Mineral or chemical fertilizers, nitrogenous (11 codes, General duty Free)
• 3103: Mineral or chemical fertilizers, phosphatic (3 codes, General duty Free)
• 3104: Mineral or chemical fertilizers, potassic (4 codes, General duty Free)
• 3105: Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg (10 codes, General duty Free)

Where it sits in the schedule

Chapter 31 is in Section VI of the Harmonized System, chemical products (chapters 28 to 38). Rates are those printed in the 2026 HTS Revision 23; Chapter 99 duties (Section 232, Section 301, IEEPA) are charged on top and are not included.