California Agricultural Exports: Trading Partners and Key Commodities

California ships more food and agricultural products to foreign markets than any other U.S. state — a fact that becomes vivid when you consider that the state's farm export value regularly exceeds $20 billion in a single year. This page covers which commodities dominate those shipments, which countries receive them, how export channels actually function, and where the system draws hard lines around eligibility and market access. Understanding the architecture of California's export trade matters because it shapes pricing, land use decisions, and the economic viability of farms across the state's diverse growing regions.

Definition and scope

Agricultural exports, in the California context, are raw, minimally processed, or value-added food and fiber products grown or produced within the state and shipped to foreign buyers under federal export documentation. The category spans everything from fresh almonds and dried raisins to bottled wine, fluid milk powder, and cut flowers.

The California Department of Food and Agriculture (CDFA) tracks export data in partnership with the USDA Economic Research Service (USDA ERS), which publishes the annual State Agricultural Trade Data series. According to USDA ERS, California's agricultural exports totaled approximately $23.6 billion in fiscal year 2022, accounting for roughly 13 percent of total U.S. agricultural export value — a share no other state matches.

Scope boundary: This page addresses California-origin products moving through federal export channels governed by USDA, the U.S. Food and Drug Administration (FDA), and U.S. Customs and Border Protection (CBP). Products re-exported through California ports but grown elsewhere fall outside this scope. Federal trade policy, including tariff schedules and trade agreement enforcement, is set at the national level and does not vary by California state law. Exporters operating under organic certification face additional federal-layer rules covered separately under California organic farming.

How it works

The export pipeline for California agricultural goods moves through four distinct stages.

1. Production and domestic aggregation. Growers harvest and, in many cases, sort and pack on-site or through regional packinghouses. Tree nuts — almonds, pistachios, walnuts — are among the most heavily consolidated crops, with large handler networks in the Central Valley aggregating supply before it moves to port.

2. Phytosanitary certification and inspection. Shipments bound for foreign markets require phytosanitary certificates issued by USDA's Animal and Plant Health Inspection Service (APHIS). Each destination country sets its own pest and disease tolerances, and CDFA inspectors coordinate with APHIS to verify compliance before export documentation clears.

3. Port movement. The Port of Los Angeles and the Port of Long Beach together handle a dominant share of California's containerized agricultural exports. Refrigerated containers — reefer units — carry fresh produce, dairy, and fresh meat products. Bulk dry cargo handles grains and some nut shipments.

4. Destination market customs clearance. Importing countries apply their own residue tolerances, labeling requirements, and, in some cases, country-of-origin marking rules that differ materially from U.S. domestic standards. The European Union's maximum residue level (MRL) framework, administered under Regulation (EC) No 396/2005, is notably stricter than U.S. EPA tolerances on a chemical-by-chemical basis — a distinction that shapes pesticide choices in California orchards well before harvest.

The California agricultural economic impact of this pipeline extends beyond farm gate revenue into trucking, cold storage, port logistics, and financial services tied to letters of credit and export insurance.

Common scenarios

Tree nuts to Asia. Almonds represent California's single largest agricultural export commodity. The Almond Board of California reports that roughly 70 percent of the state's almond crop is exported annually, with India, Spain, Germany, and China among the top destination markets. A typical transaction involves a handler in Fresno or Kern County negotiating directly with an overseas importer, often six to twelve months before harvest, with price settled in U.S. dollars and payment secured through a confirmed letter of credit.

Wine to the European Union and United Kingdom. California wine grape exports face a layered regulatory environment. The EU requires wine to meet geographic indication labeling rules, and post-Brexit, the United Kingdom has maintained its own separate certification regime. Wineries exporting to the UK must comply with UK Conformity Assessed (UKCA) labeling requirements and provide a VI-1 certificate — a product analysis and certification document — for each shipment.

Dairy ingredients to Southeast Asia and Mexico. California is the largest dairy-producing state in the U.S. Much of its export volume moves as non-fat dry milk powder and whey protein concentrate rather than fluid milk. Mexico and Southeast Asian markets, particularly the Philippines and Indonesia, absorb significant volumes. The California dairy industry benefits from proximity to Pacific Rim ports, which reduces transit time and refrigeration costs compared with Midwestern competitors.

Fresh produce to Canada. Canada is consistently California's largest single-country agricultural trading partner by volume, absorbing lettuce, strawberries, table grapes, and citrus from the Salinas Valley and San Joaquin Valley. The U.S.-Mexico-Canada Agreement (USMCA), which replaced NAFTA in 2020 (Office of the United States Trade Representative), eliminated tariffs on covered agricultural goods traded between the three countries, making Canadian market access structurally different from shipments to tariff-applying markets in Asia or the EU.

Decision boundaries

Not every California-grown commodity can move freely to every market. Three decision points determine whether an export is viable.

Pest and disease status of the origin region. A county or district under a quarantine order from CDFA or APHIS may be blocked from exporting certain hosts of regulated pests. Citrus from a Pierce's disease or Asian citrus psyllid-affected zone faces export restrictions to countries with zero-tolerance policies for those organisms.

Residue compliance with destination MRLs. A California grower using a legally registered pesticide under California's pesticide regulatory framework may still find that residues on the harvested crop exceed the importing country's MRL — legally grown domestically, commercially blocked at the border. This is a common friction point with EU and Japanese markets.

Value-added vs. raw commodity. Fresh almonds, processed almond butter, and almond-based beverages each fall under different Harmonized System (HS) tariff codes and may face different tariff rates or regulatory classifications in the importing country. The distinction between raw and value-added is not cosmetic — it can determine whether a product enters duty-free under a bilateral agreement or faces a standard-rate tariff. Growers and handlers exploring agtech innovation in processing are increasingly attentive to where these boundaries sit.

The full scope of California's agricultural trade, from growing conditions to market access strategy, begins with understanding the state's production base — covered at the California Agriculture Authority home.