U.S. imports of Phosphorus-Potassium (PK) Fertilizers (SITC 56292) totaled $1.4M in August 2026, imported from 22 countries.
Importers of Phosphorus-Potassium (PK) Fertilizers paid $38K in duties in August 2026, an average duty rate of 2.79% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Phosphorus-Potassium (PK) Fertilizers imports of $1.4M in August 2026 ran 52% below the year-to-date monthly average of $2.8M.
Last updated: August 2026 dataPhosphorus-potassium fertilizers, containing no nitrogen component, serve specialized agronomic roles — particularly in late-season applications where added nitrogen would be counterproductive, or in soils already nitrogen-sufficient. The dual-nutrient PK formulation is less common in bulk commodity trade than full NPK blends, making this a narrower import category. Correct classification requires confirming the absence of a meaningful nitrogen fraction, as even trace nitrogen content could shift the product into an NPK heading.
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37 import shipments a month
Classification authorities generally look at whether nitrogen is present as a deliberate fertilizing element rather than a trace impurity. If nitrogen is intentionally added or present at agronomically significant levels, the product may be reclassified as an NPK fertilizer. Importers should obtain a detailed certificate of analysis and seek a binding ruling if the nitrogen content is borderline.
PK fertilizers are commonly used in perennial crop programs, turf management, and late-season applications for root crops and bulbs where nitrogen application must be minimized. They are also used to correct specific soil deficiencies without altering the nitrogen balance, making them a targeted rather than bulk-volume product.
Basic heading 386 of 465 in section 5
Basic heading 56292 · $1.4M of $27.5B
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Imports · August 2026
origin
Canada and Australia together supply 57% of it. China pays 25.0% duty; Australia 0.0%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$1.4MYoY · free account
Exports
$1.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $34.7M of Phosphorus-Potassium (PK) Fertilizers and exported $15.4M.
Through August 2026. Source: U.S. Census Bureau.