Where do pistachios come from?

In 2024 United States produced 498,950 tonnes, 36% of the world's 1.4 million tonnes (FAOSTAT). Turkey (Türkiye) followed with 28%, then Iran (23%), Syria (6.1%) and China (5.7%). The top five account for 99%, 18 countries reported output and 0.2% came from outside the top ten. World production changed +56% over the ten years to 2024 and +7% on the previous year.

Pistachio is the most concentrated of the major tree nuts: only a handful of countries grow it at scale, and the crop is measured in shell. Iran's orchards sit on the arid plateau around Kerman and Rafsanjan, Turkey's around Gaziantep and Şanlıurfa, and California's in the southern San Joaquin Valley. Syria's crop around Aleppo is old and substantial but has been disrupted for years.

Comparing any one year between countries is treacherous, because the tree bears heavily one season and lightly the next and the cycles in different countries do not line up. A year in which California is on and Iran is off, or the reverse, changes the ranking without anything structural having happened at all.

United States was the largest exporter of pistachios (HS 080251) in 2024 with 72% of world export value, ahead of Iran (14%), on world trade of $3.4 billion (CEPII BACI). China was the largest importer with 26%.

Shelled kernels are a separate and smaller line. In 2024 United States exported 27% of a kernel trade worth $1.3 billion, with Turkey (Türkiye) on 22% and Iran on 19%; Germany was the largest buyer with 18%.

The split matters. In-shell nuts go to snack markets that want to open them by hand, above all China and the Gulf, while kernels go to bakers and confectioners in Germany, Italy and Turkey who need green nutmeat for ice cream, baklava and mortadella. Turkey exports kernels and imports in-shell nuts at the same time.

There is no futures market and no free public benchmark price for pistachios, so this site quotes none. In California growers deliver to a processor and are paid a pool return settled over the marketing year, adjusted for the split rate, kernel color and defects in their delivery. In Iran the crop moves through private traders and exporters, and prices are quoted in local currency, so exchange rate moves are part of the price.

What is visible instead are trade assessments, customs statistics and industry shipment reports. Grading is unusually detailed: naturally split in-shell nuts carry a large premium over closed shells, size is counted per ounce, and a bright green kernel is worth more than a pale one. Aflatoxin results price the lot too, because a failed consignment cannot enter its intended market.

A pistachio tree sets a heavy crop one year and a light one the next, because buds for the following season abort while a big crop fills. Whole regions swing together, so supply arrives in a two-year rhythm that orchard management cannot fully remove.

Buds need accumulated winter cold to break evenly in spring. A warm winter gives a straggling bloom in which the wind-pollinated male and female trees are out of step, and the crop fails to set, as California found after the warm winter of 2015.

Pistachios are prone to a mold that produces aflatoxin, and importing countries test for it at the border. A single failing consignment can be rejected, and repeated failures have brought certification requirements on a whole origin, which raises cost and slows shipment.

United States antidumping duties on Iranian in-shell pistachios have stood since 1986, and broader sanctions restrict Iranian trade and payment. The result is a market split by policy as well as geography, with Iranian nuts routed toward Asia, the Gulf and Europe rather than North America.

Pistachio tolerates saline, alkaline soils and drought better than almond, which is why it is planted where little else thrives. It still needs irrigation, and Californian groundwater is being capped basin by basin, so expansion is a claim on a shrinking allocation.

Pistachio is dioecious, with separate male and female trees, and pollen travels on the wind rather than by insects, so orchards scatter males among the females and rely on both flowering at the same moment. Trees are grafted onto rootstock, take five to seven years to bear and stay productive for decades.

Through the summer the kernel fills and the shell hardens; when the kernel is full it expands and splits the shell along a seam, which is the crack a shopper opens by hand. Harvest is a single pass in late summer, by trunk shaker onto a catch frame, and speed matters: the hull must come off within hours, because a heap of unhulled nuts stains and molds.

At the plant the hull is stripped, the nuts floated to separate open from closed shells, dried, sized, sorted by machine and by hand, then roasted and salted or held raw. Closed shells are cracked mechanically for kernel, and kernels are peeled and color-sorted, since green is what a baker pays for.

Most pistachios are eaten in the shell as a roasted, salted snack, and that market takes the best of the crop. Kernels go into ice cream, nougat, halva, baklava and Turkish delight, into mortadella, and into bakery and chocolate, where the color is as much the point as the flavour.

By-products stay close to the orchard. Hulls are composted or fed to livestock and are also a source of natural pigments and tannins. Shells go to fuel, bedding and abrasives, and increasingly to activated carbon. Kernels that fail on color or size are ground into paste, where appearance no longer prices the product.

Processing sits beside the orchards, because the hull has to come off within hours of shaking. In California a small number of large processors take the crop; in Iran the chain runs through village traders, terminal markets in Rafsanjan and Tehran, and exporters.

The traded product is dry, stable and packed in cartons or vacuum bags, so it needs no cold chain. Aflatoxin certification, not refrigeration, governs whether a consignment clears customs, and testing regimes differ enough between destinations that lots are pre-sorted by market.

The structural risks are concentration and biennial supply. Three countries grow nearly all of it, each has a two-year bearing cycle, and one of them is under long-standing trade restrictions. A poor Californian set and a Turkish off-year in the same season leave buyers with very little to fall back on.