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HSChapter 31
U.S. imports of potassic fertilizers, nesoi (HS 310490) totaled $2.0M in April 2026, traded with 14 countries.
Importers of Potassic Fertilizers, NESOI paid $14K in duties in April 2026 — an effective duty rate of 15% on $92K in dutiable value, based on actual customs collections rather than the published tariff schedule. Potassic Fertilizers, NESOI imports of $2.0M in April 2026 ran 43% below the year-to-date monthly average of $3.6M.
Last updated: April 2026 dataPotassic fertilizers not elsewhere specified — including potassium magnesium sulfate (langbeinite/K-Mag) and other specialty potassic compounds that don't qualify as potassium chloride or potassium sulfate — enter under a single tariff line, 3104900100. The United Kingdom and Canada are the leading suppliers, with Israel and the Netherlands also contributing meaningfully. Specialty potassic products in this heading often serve niche agronomic applications where secondary nutrient content (magnesium, sulfur) is as commercially important as the potassium itself.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Heading 310490 is a residual category for potassic fertilizers that are neither potassium chloride (310420) nor potassium sulfate (310430). Products like potassium magnesium sulfate (langbeinite) or potassium nitrate used as fertilizer typically fall here when they don't meet the specific chemical definitions of the named headings.
CBP may request a certificate of analysis confirming the chemical composition, particularly the K₂O equivalent and any secondary nutrients. Clear documentation helps avoid reclassification disputes and supports accurate duty calculation, especially for blended or multi-nutrient products that could potentially fall under Chapter 31's compound fertilizer headings instead.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $577K | $2.7M | +$2.1M |
| MEXICO | -- | $1.6M | +$1.6M |
| UNITED KINGDOM | $1.1M | -- | -$1.1M |
| JAPAN | $33K | $272K | +$238K |
| UNITED ARAB EMIRATES | $160K | -- | -$160K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3104900100 | MINERAL OR CHEMICAL FERTILIZER, POTASSIC, NESOI | $2.0M | 14.79% | $14K |
MINERAL OR CHEMICAL FERTILIZER, POTASSIC, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3104900100 | MINERAL OR CHEMICAL FERTILIZER, POTASSIC, NESOI | $5.0M |
MINERAL OR CHEMICAL FERTILIZER, POTASSIC, NESOI
10.7K t
| State | Imports | Exports | Balance |
|---|---|---|---|
| New Mexico | -- | $3.6M | +$3.6M |
| Virginia | $1.1M | -- | -$1.1M |
| Texas | $5K | $420K | +$415K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| PORT HURON, MI | $108K | $1.2M | +$1.1M |
| EL PASO, TX | -- | $1.3M | +$1.3M |
| NORFOLK-NEWPORT NEWS, VA | $1.2M | -- | -$1.2M |