HTS Chapter 31: Fertilisers
HTS Chapter 31 covers Fertilisers. Browse 4 published headings, then narrow to the active product line that matches the goods.
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS Chapter 31 covers fertilizers and related nutrient products. It includes certain animal or vegetable fertilizers, nitrogenous fertilizers, phosphatic fertilizers, potassic fertilizers, and products containing two or more of the fertilizing elements nitrogen, phosphorus, and potassium. Some fertilizer products in tablets or similar forms, or in small packages, are addressed within the chapter’s provisions. Classification depends on the product’s composition and presentation—not only on whether the seller or buyer uses it as fertilizer.
The HTS is read in levels: a chapter identifies a broad product group; a heading generally uses four digits; a subheading adds more detail, usually at six digits; and the complete U.S. classification is a 10-digit code. Within Chapter 31, compare the product’s ingredients, nutrient content, mixtures, physical form, and packaging against the wording and legal notes for the relevant heading and subheading. The final code may also depend on U.S.-specific statistical provisions, so confirm it in the current HTS and seek customs-broker advice when the formulation is complex.
What to check
- Obtain the product’s complete ingredient list, technical data sheet, nutrient analysis, and manufacturing description before classifying it.
- Distinguish mineral or chemical fertilizers from products classified by another material or product provision; intended agricultural use alone does not control classification.
- Check whether the product is a single-nutrient fertilizer, a product containing multiple fertilizing elements, a mixture, or a fertilizer in a specifically described form or package.
- Review Chapter 31 notes and the exclusions or competing provisions in other chapters, especially where the product contains non-fertilizer ingredients or is marketed for a specialized use.
- Verify any applicable Chapter 99 provisions, additional duties, quotas, or other trade measures separately from the ordinary Chapter 31 classification, using current official HTS and agency information.
How to use this chapter
A chapter is the first classification level, not a duty rate. Choose the heading that describes the product, narrow by material, construction, use, or other legal distinctions, and verify the final line against the official HTS notes.
Heading list
| HTS code | Description | Linked 8-digit entries |
|---|---|---|
| 3102 | Mineral or chemical fertilizers, nitrogenous: | 1 |
| 3103 | Mineral or chemical fertilizers, phosphatic: | 0 |
| 3104 | Mineral or chemical fertilizers, potassic: | 1 |
| 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: | 2 |
Linked measures
0 linked measure entries in the current snapshot.
Questions about HTS Chapter 31
What does HTS Chapter 31 cover?
HTS Chapter 31 covers Fertilisers. This page groups the chapter’s 4-digit headings; a shipment still needs the most specific active 8- or 10-digit line supported by the product facts.
Is HTS Chapter 31 a final product classification?
No. A chapter is a broad 2-digit category. Narrow it to the applicable heading and the most specific active statistical line before estimating duty or filing an entry.