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HSChapter 10
U.S. imports of certified corn (maize) seed, excluding sweet corn (HS 100510) totaled $17.7M in April 2026, traded with 15 countries.
Importers of Certified Corn (Maize) Seed, Excluding Sweet Corn paid $1.5M in duties in April 2026 — an effective duty rate of 8.7% on $17.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Certified Corn (Maize) Seed, Excluding Sweet Corn imports of $17.7M in April 2026 ran 89% above the year-to-date monthly average of $9.3M.
Last updated: April 2026 dataCertified seed corn — divided between yellow corn seed (1005100010) and other varieties (1005100090) — is a high-value agricultural input subject to USDA APHIS phytosanitary controls and, in many cases, plant variety protection or patent restrictions that govern how seed may be replanted or resold. Chile leads US import supply, followed by Canada and France, a pattern driven by counter-seasonal seed multiplication in the Southern Hemisphere and European hybrid development programs. Importers should confirm that seed lots carry both phytosanitary certification and any required variety licensing documentation.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Chile's Southern Hemisphere growing season allows seed companies to multiply hybrid corn seed during the Northern Hemisphere's off-season, enabling US seed producers to accelerate variety development cycles and maintain year-round supply. This counter-seasonal multiplication model makes Chile a structurally important source regardless of its domestic corn production scale.
Certified corn seed imports require a phytosanitary certificate from the exporting country and are subject to USDA APHIS inspection at the port of entry. Additionally, seed lots protected by plant variety protection certificates or utility patents may require licensing agreements with the variety owner before importation or sale. Consult a licensed customs broker or APHIS for current admissibility requirements.
Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHILE | $15.6M | -- | -$15.6M |
| CANADA | $468K | $14.2M | +$13.8M |
| SOUTH AFRICA | -- | $5.7M | +$5.7M |
| MEXICO | $39K | $1.1M | +$1.1M |
| FRANCE | $732K | -- | -$732K |
Supplier Network
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 1005100010 | YELLOW CORN (MAIZE), SEED | $10.1M | 7.75% | $750K |
| 1005100090 | CORN (MAIZE) SEED, OTHER THAN YELLOW CORN | $7.5M | 10.00% | $749K |
YELLOW CORN (MAIZE), SEED
CORN (MAIZE) SEED, OTHER THAN YELLOW CORN
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 1005100090 | CORN (MAIZE) SEED, OTHER THAN YELLOW CORN | $15.5M |
| 1005100010 | YELLOW CORN (MAIZE), SEED | $6.6M |
CORN (MAIZE) SEED, OTHER THAN YELLOW CORN
2.4M kg
YELLOW CORN (MAIZE), SEED
3.0M kg
| State | Imports | Exports | Balance |
|---|---|---|---|
| Iowa | $7.6M | $10.4M | +$2.7M |
| Pennsylvania | $5.7M | $51K | -$5.7M |
| Michigan | $16K | $3.6M | +$3.6M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| PHILADELPHIA, PA | $10.7M | -- | -$10.7M |
| DETROIT, MI | -- | $7.8M | +$7.8M |
| MIAMI INTERNATIONAL AIRPORT, FL | $5.8M | -- | -$5.8M |