HS Code 31.01 – Fertilizers; animal or vegetable, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products

HS code 3101 is a 4-digit heading in the Harmonized System that covers: Fertilizers; animal or vegetable, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products. Heading 3101 specifically covers fertilizers of animal or vegetable origin, whether or not mixed together or chemically treated, and fertilizers produced by the mixing or chemical treatment of animal or vegetable products. This category is crucial for the agricultural sector, particularly for organic farming and sustainable practices. The scope includes natural manures (e.g., farmyard manure, guano), compost, and other organic materials that are primarily used to enrich soil and promote plant growth. It explicitly excludes mineral or chemical fertilizers, which are classified in headings 3102 to 3105. Key sub-categories involve processed animal by-products (like bone meal, blood meal), various composted plant materials, seaweed-based fertilizers, and mixtures of these organic components. For trade compliance, accurate classification under 3101 is vital as these products may be subject to different import regulations, phytosanitary controls, and environmental standards compared to synthetic fertilizers. Their trade often supports organic agriculture certifications and can impact duty rates based on their natural origin. Historically, organic fertilizers were the primary means of soil enrichment, and their importance has seen a resurgence with growing demand for organic produce and environmentally friendly farming practices, placing this heading firmly within Chapter 31 (Fertilizers) as a fundamental category.

Composted animal manure, Bat guano, Worm castings, Bone meal, Blood meal, Fish emulsion fertilizer, Seaweed extract fertilizer, Alfalfa meal, Feather meal, Cottonseed meal, Composted plant matter, Mushroom compost, Vermicompost, Green manure (e.g., cover crops processed as fertilizer), Humic acids from natural sources, Leonardite (if processed for fertilizer use), Spent mushroom substrate, Poultry litter fertilizer, Sheep manure pellets, Horse manure compost, Biochar (for soil amendment), Liquid kelp fertilizer, Crab meal, Shrimp meal, Cocoa bean shells (as fertilizer)

Common misclassifications for HS 3101 often involve distinguishing it from other fertilizer types or even animal feed. Traders sometimes confuse organic fertilizers with mineral or chemical fertilizers (3102-3105), which have different compositions and regulatory requirements. For example, a product containing a mix of organic and synthetic nutrients might be incorrectly placed in 3101 if the organic component isn't predominant, when it should be in 3105 (other fertilizers). Another frequent error is confusing products like 'locust beans, seaweed and other algae' (1212) with prepared organic fertilizers; 1212 covers them in their raw state, while 3101 applies when they are processed or mixed specifically for use as fertilizer. Similarly, animal feed preparations (2309) can be mistaken, but 3101 is exclusively for products used as soil amendments, not animal consumption.

In 2025, the top exporters of HS code 3101 in UN Comtrade data were the Netherlands ($295M, 20% of world exports), Belgium ($196M) and Italy ($192M). World exports came to about $1.4B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 3101 in UN Comtrade data were France ($121M, 8.5% of world imports), Spain ($115M) and Italy ($96M). World imports came to about $1.4B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 1.7% of its imports here ($1.7M, CEPII BACI), so it may also belong among the top importers.

HS code 3101 is a 4-digit heading under Chapter 31 of the Harmonized System. The first 2 digits (31) identify the chapter, and digits 3-4 (01) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.