Classification
Product TypeRaw Material
Product FormShelled Kernel Halves
Industry PositionPrimary Agricultural Product
Raw Material
Commodity GroupTree Nuts
Scientific NameJuglans regia
PerishabilityHigh
Growing Conditions- Temperate climate with winter chill
- Well-drained soils
- Protection from spring frost during flowering
- Dry harvest weather to limit mold and kernel damage
Main VarietiesChandler, Hartley, Howard, Tulare, Serr, Vina
Consumption Forms- Shelled snack kernels
- Bakery and confectionery ingredient
- Mixed nut products
- Food manufacturing ingredient
Grading Factors- Kernel color
- Size
- Wholeness versus pieces
- Freedom from shell fragments
- Moisture and rancidity control
Planting to Harvest4 to 7 years to first commercial harvest
Market
Raw walnut kernel halves are a globally traded tree-nut commodity positioned between orchard production and snack or ingredient use. China is the largest producer, while the United States, Chile, and Ukraine are the main export origins; California alone supplies about half of world walnut trade. Demand is concentrated in premium snack and confectionery markets, with India, Turkey, Germany, Italy, the Netherlands, and Taiwan among the important import destinations. Trade is seasonal and price-sensitive because output is concentrated and quality depends on shelling, drying, and color grading.
Market GrowthMixed (medium-term outlook)Long-term demand is supported by health-oriented snacking and confectionery use, but year-to-year trade is uneven because production is weather-sensitive and alternate-bearing.
Major Producing Countries- ChinaLargest global producer; USDA FAS reports around 55% of world supply, with Xinjiang and Yunnan the main production provinces.
- United StatesCalifornia produces 99% of U.S. walnuts and accounts for about half of world walnut trade.
- ChileMajor Southern Hemisphere producer and exporter; most output is exported, with central-south regions dominating planted area.
- UkraineSignificant European producer; most commercial exports are shelled walnuts, with the EU as the main destination.
- TurkiyeCommercial production is spread across many provinces, but domestic demand remains strong and import needs are still material.
Major Exporting Countries- United StatesDominant global exporter of walnut kernels and in-shell walnuts.
- ChileExports the majority of its walnut crop; key export destinations include India, Turkey, Italy, and Germany.
- ChinaWalnut exports have expanded and are sold to more than 50 markets, mostly in Belt and Road destinations.
- UkraineMost exports are shelled walnuts; the EU takes the bulk of shipped volume.
Major Importing Countries- IndiaA key market for walnut imports and highly tariff-sensitive for Chilean supply.
- TurkiyeA major consumer-importer; also one of the key destinations for Chilean walnuts.
- GermanyA growing European destination for Chilean walnuts and a premium kernel market.
- ItalyOne of the leading destinations for Chilean walnuts and a major EU consumer market.
- NetherlandsA recurring EU destination and distribution hub for walnut trade.
- TaiwanA premium tree-nut market where U.S. walnut exports were substantial in 2024.
Supply Calendar- California, United States:Aug, Sep, Oct, NovHarvest runs from late August through late November.
- China:Sep, Oct, NovHarvest begins in early September; Xinjiang and Yunnan dominate output.
- Chile:Mar, Apr, May, JunMarch-April harvest supports Southern Hemisphere counter-seasonal supply; exports often peak in May-June.
- Ukraine:Sep, OctHarvest typically runs from late September through late October.
Specification
Major VarietiesChandler, Hartley, Howard, Tulare, Serr, Vina
Physical Attributes- Kernel halves are the premium commercial form, with light color favored in export trade.
- Well-dried kernels should be clean and free from shell fragments, mold, shriveling, discoloration, and rancidity.
- Commercial lots are commonly sorted by size and color, with lower-color kernels sold into lower grades or processing channels.
Compositional Metrics- Post-drying moisture is commonly driven to about 8% for storage stability.
- Kernel color is commercially graded from extra light through amber and red.
- Kernel yield and the share of whole halves versus broken pieces are important value indicators.
Grades- USDA U.S. No. 1
- USDA U.S. Commercial
- UNECE Walnut Kernels DDP-02
Packaging- Bags and bulk bins are common in retail and wholesale channels.
- Packed formats must protect the kernels during export and handling.
- Sealed packages can be held in refrigerated or frozen storage to preserve freshness.
ProcessingShelling is followed by sorting by size and color before packing.Halves, pieces, and chopped forms are all traded, but halves carry the strongest premium.Heat exposure accelerates rancidity, so post-drying handling and storage are critical.
Supply Chain
Value Chain- Harvest -> hulling -> drying -> shelling -> sorting by color and size -> packaging -> cold storage -> export/import distribution -> retail or food manufacturing
Demand Drivers- Health-oriented snack consumption
- Confectionery, bakery, and dessert ingredient demand
- Premium mixed-nut and private-label snack packs
- Food manufacturing demand for halves and fragments
Temperature- Cold storage slows rancidity and preserves flavor.
- Warm storage shortens usable life because walnut fats oxidize.
- Refrigerated or frozen storage is preferred for longer holding.
Atmosphere Control- Nitrogen flushing can extend shelf life of unopened sealed product.
- Sealed packaging helps protect kernels from oxygen exposure and odor pickup.
Shelf Life- Shelf quality is highly sensitive to heat and moisture.
- Frozen storage is commonly used when product must be held for longer periods.
- Once opened, product should be kept sealed and cold to slow flavor deterioration.
Risks
Supply Concentration HighChina supplies about 55% of global walnuts and California accounts for roughly half of world trade, so a weather shock, pest event, or policy disruption in either origin can quickly tighten supply and lift kernel prices worldwide.Diversify sourcing across the Southern Hemisphere and Eastern Europe, and maintain flexible specs for color and piece size.
Climate MediumWalnut yields and kernel quality are sensitive to drought, heat, frost, and cold weather during flowering. USDA reporting points to drought in northwest China, cold at flowering in Yunnan, and frost or drought risk in Turkey and Chile.Spread origin exposure across hemispheres and monitor bloom, water, and harvest conditions closely.
Trade Policy MediumWalnut flows can be rerouted by tariffs and market-access rules. Chile reports a 100% tariff on walnuts into India, and China has tariff friction on U.S. tree nuts, which can shift demand among origins.Qualify alternative destinations early and keep customs, labeling, and phytosanitary documentation aligned by market.
Sustainability- Water stewardship and irrigation pressure in major producing regions
- Climate sensitivity to drought, heat, frost, and flowering-time cold stress
- Land-use competition in Chile as walnut area shifts toward higher-value fruit crops and urban expansion
Labor & Social- Labor-intensive harvesting and manual sorting
- Rising labor costs and rural labor shortages in China and Ukraine
- Manual shelling and batch formation challenges for consistent export quality
FAQ
Which country produces the most walnuts globally?China is the largest walnut producer, and USDA reporting places it at about 55% of global supply.
Which country dominates global walnut exports?The United States is the dominant exporter, with California supplying about half of the world walnut trade.
What grades matter most for shelled walnut kernels?The key commercial grades are USDA U.S. No. 1 and USDA U.S. Commercial, and UNECE also publishes a walnut kernels standard for export trade.
When is the main harvest window for walnuts?California harvest runs from late August through late November, China starts in early September, Ukraine harvests from late September through late October, and Chile harvests in March and April.