Classification
Product TypeRaw Material
Product FormShelled Kernel Pieces and Halves
Industry PositionPrimary Agricultural Product
Raw Material
Commodity GroupTree Nut
Scientific NameJuglans regia
PerishabilityMedium
Growing Conditions- High chill requirement orchard crop
- Commercial production usually depends on managed irrigation
- Dry harvest weather improves kernel quality and reduces mold risk
Main VarietiesChandler, Hartley, Howard, Tulare, Serr, Vina
Consumption Forms- Snack packs and ingredient packs
- Baking and confectionery
- Food manufacturing and retail bakery use
Grading Factors- Kernel size class
- Kernel color
- Well-dried condition
- Cleanliness and freedom from shell, foreign material, rancidity, insect injury, and decay
Planting to Harvest5 to 7 years to first commercial harvest
Market
Walnut kernel pieces and halves are a high-value shelled tree nut form used in snacking, baking, confectionery, and food manufacturing. Global supply is concentrated in China, the United States, Chile, and Ukraine, while import demand is anchored by India, Turkey, the United Arab Emirates, China, and Russia. The trade is highly quality-sensitive because kernels must be dried, sorted by size and color, and kept cold to avoid rancidity.
Market GrowthGrowing (medium-term)Long-term expansion in global walnut trade, with strong import demand but annual volatility from crop and weather swings.
Major Producing Countries- 중국Largest global producer and a major source of both domestic consumption and export supply.
- 미국California dominates U.S. output and remains a cornerstone of global walnut trade.
- 칠레Important counterseasonal Southern Hemisphere origin with strong export orientation.
- 우크라이나Important Eastern European origin; shelled production and household orchards both matter.
- 터키Meaningful producer, with a larger share of output absorbed by domestic and nearby markets.
Major Exporting Countries- 미국Leading shelled-walnut exporter; California supplies about half of world walnut trade.
- 중국Notable supplier of in-shell and shelled walnuts; export availability has recovered after earlier disruption.
- 칠레Counterseasonal exporter with strong shipments to Europe, the Middle East, and Asia.
- 우크라이나Most exports are shelled, with the EU as a key destination.
Major Importing Countries- 인도Significant importer due to strong demand and limited local production.
- 터키Imports substantial volumes to meet steady consumer demand.
- 아랍에미리트Important import and re-export hub for nuts.
- 중국Large tree nut import market, even as domestic walnut output has expanded.
- 러시아Expanding demand market in the Black Sea and CIS trade corridor.
Supply Calendar- United States (California):Aug, Sep, Oct, NovLate August to late November harvest window; early varieties begin in September.
- China:Aug, SepHarvest normally begins from mid-August to mid-September in many producing areas.
- Chile:Mar, Apr, MaySouthern Hemisphere counterseason harvest, often around March-April and into May.
- Ukraine:Sep, OctHarvest typically runs from the end of September through the end of October.
Specification
Major VarietiesChandler, Hartley, Howard, Tulare, Serr, Vina
Physical Attributes- Shelled kernels are sold as halves, pieces and halves, pieces, or small pieces.
- Color is a major commercial attribute, typically graded from extra light through amber, with red as a separate color class.
- Commercial lots are expected to be well dried, clean, and free from shell fragments, foreign material, decay, and rancidity.
Compositional Metrics- Air-dried to about 8% moisture for storage and handling stability.
- Kernel size and half-kernel share are specified by grade and weight basis.
Grades- USDA U.S. No. 1
- USDA U.S. Commercial
- Halves
- Pieces and Halves
- Pieces
- Small Pieces
Packaging- 25 lb corrugated boxes lined with poly bags for halves and pieces
- 30 lb boxes for smaller kernel sizes
- 1,000 to 2,000 lb industrial containers
- Sealed retail bags and tins
ProcessingHusked, air-dried, mechanically cracked, and screened into graded halves and pieces.Kernels are color-sorted and hand-sorted before packing.Low moisture and cold storage are used to preserve quality and slow rancidity.
Supply Chain
Value Chain- Orchard harvest -> hulling -> air-drying -> shell cracking -> screening by size and color -> hand sorting -> packing -> cold storage -> export distribution
Demand Drivers- Retail snacking demand
- Baking and confectionery ingredient demand
- Food manufacturing and foodservice usage
- Health-positioned plant-based fat and protein profile
Temperature- Refrigerated storage at 0°C to 5°C is recommended for shorter holding periods.
- Frozen storage at -18°C is preferred for longer holding periods.
Shelf Life- Quality is best preserved in airtight, cold storage rather than warm ambient conditions.
- Warm exposure accelerates rancidity and flavor loss.
Risks
Supply Concentration HighGlobal walnut supply is concentrated in a few origins, especially China, the United States, Chile, and Ukraine. Weather damage, labor disruption, or policy shocks in any one of these countries can move prices quickly because buyers have limited substitute origins.Diversify sourcing across hemispheres, qualify alternate shellers, and hold buffer inventory ahead of harvest.
Climate MediumWalnuts are a high-chill tree crop and are sensitive to drought, heat, frost, and untimely rain at harvest. Water stress in California and late rain in Chile can reduce cracking yield and kernel quality.Use multi-origin sourcing, irrigation management, and crop-risk planning.
Quality Deterioration MediumShelled kernels absorb odors and oxidize if they are exposed to warmth, light, or air, which shortens shelf life and raises rejection risk in retail and industrial channels.Maintain airtight packaging, refrigerated storage, and strict FIFO rotation.
Sustainability- Water stewardship in irrigated walnut orchards
- Climate resilience to chill-hour variability, drought, frost, and harvest rain
- Energy use for drying, refrigerated storage, and cold-chain transport
Labor & Social- Seasonal orchard labor and manual shelling remain important in some origins
- Russia-Ukraine war has increased labor pressure and processing difficulty in Ukraine
- Traceability and food-safety compliance expectations are high in export packing
FAQ
Why are walnut halves and pieces graded separately?USDA grades shelled walnuts by size classes such as Halves, Pieces and Halves, Pieces, and Small Pieces. The size class matters because buyers need consistent kernel size for retail packs and food manufacturing.
How should shelled walnuts be stored?They should be kept cold and airtight. California Walnuts recommends refrigeration for shorter storage and freezing for longer storage because warm conditions speed up rancidity.
Which countries matter most in global walnut trade?The United States is the leading exporter, and China, Chile, and Ukraine are the main competing origins in official trade reporting. On the demand side, India, Turkey, the United Arab Emirates, China, and Russia are important import markets.