From Leaf to Package: How Kratom Is Grown, Dried and Exported

Long before kratom became an international commodity, the tree Mitragyna speciosa was part of everyday life in Southeast Asia. Known as kratom in Thailand, biak in parts of Borneo, and ketum in Malaysia, it grew in the tropical landscapes where generations of rural communities learned to make use of its leaves. In southern Thailand and northern Malaysia, farmers and rubber tappers chewed kratom leaves during long hours of physical work.

Local people used the leaves as medicine. Local people used them in preparations intended to relieve common complaints including digestive upsets or muscle pains. Brewed leaf drinks became part of established patterns of consumption in some communities. 

In the nineteenth century, foreign observers took notice of kratom. The plant’s international trade came much later, turning a familiar part of local life into a crop grown for overseas buyers.

Southeast Asia: Where Kratom Enters the Trade

Indonesia is the principal source of kratom for international markets, with the island of Borneo at the center of production. West Kalimantan, in Indonesian Borneo, is the country’s leading kratom-producing region. Much of the trade is concentrated in Kapuas Hulu, a rural regency where kratom has become an important agricultural commodity. 

Indonesia’s National Research and Innovation Agency (BRIN) labels it as a crop that has gained ground at the expense of rubber. The economic incentive is clear. A 2024 study by researchers at IPB University compared kratom and rubber cultivation and found kratom more profitable. Falling rubber prices had encouraged farmers there to switch crops, while demand for kratom from overseas buyers continued to grow. 

The size of export shipments makes the scale of the trade clear. In February 2025, Indonesia’s Ministry of Trade announced the export of 351 metric tons of kratom powder, valued at $1.05 million. The shipment, produced by a company based in Pontianak, marked the first kratom export under regulations introduced in late 2024.

How Kratom Leaves Are Harvested

Harvesting takes place across kratom-growing areas of Indonesia, including parts of Kalimantan where farms range from small plots to larger plantations.

Kratom trees can begin yielding leaves within their first year. The first harvest may take place when a plant is around six months old and roughly three feet tall, although growth rates depend on growing conditions. Farmers pick mature leaves by hand and leave the growing tips intact. Subsequent harvests generally take place every six weeks to three months. Left unpruned, kratom can grow into a tree around 50 feet tall, so growers may cut back the main stem when the plant reaches about two and a half years old. This encourages branching and makes the foliage easier to reach.

Kratom leaves can look quite different from one another. In the trade, leaves with sharply pointed edges are described as “horned,” while unusually large leaves may be marketed as “elephant” products. Harvesters also pay attention to maturity, as a leaf’s chemical profile can change as it develops. Heavy insect damage can reduce the amount of usable leaf a tree provides.

How Kratom Leaves Are Dried and Fermented

Fresh kratom leaves contain too much moisture for storage. Producers have to dry them before they can be ground, but the removal method affects the finished powder.

On smaller farms, workers often spread freshly picked leaves across clean tarpaulins in the open air. The sun and breeze dry the foliage without the cost of mechanical equipment. The weather remains a problem. Rain can keep the leaves wet for hours, while prolonged exposure to direct sun may turn them a darker shade.

 Producers who want to retain a greener color may prefer to dry them under cover. The leaves rest on open racks, protected from sudden downpours and direct sunlight. At larger facilities, mechanical dryers offer tighter control over the heat applied to the leaves.

The equipment is expensive, but it allows producers to dry the leaves faster and gives them greater control over the characteristics of the finished batch.

Producers have to weigh speed against the potential loss of mitragynine. Lower temperatures are believed to help preserve the precious alkaloid, but they can extend the time needed to remove moisture from the leaves.

Some producers ferment kratom leaves before drying them to develop a darker color and a less grassy, more tea-like flavor. During the treatment, enzymes alter compounds in the leaf, which can also change its alkaloid profile. The aim of this approach is to create a different sensory character in the finished powder, rather than simply remove moisture.

How Kratom Leaf Is Ground Into Powder

Once the leaves are dry, they are prepared for the grinder: this may include removing stems and thick central veins before the leaf goes into an industrial mill. These tougher parts can affect the texture of the powder, so the amount removed influences the finished product.

The first pass through the grinder may leave coarse fragments mixed with fine powder. The ground leaf is then sifted through a screen to separate the two.

Coarse pieces are separated and returned to the mill, while the finer powder is collected for further preparation. The screen size determines which particles pass through and allows the operator to produce the uniform result that buyers demand.

Indonesia also sets an export limit: kratom powder must have a particle size below 600 microns, or 0.6 millimeters. Processors need equipment capable of producing a grind fine enough to meet that threshold. 

Buyers may also request a particular texture for their intended use, so some batches need a finer grind than others. Grinding too coarsely leaves visible fragments; a finer powder feels smoother and is easier for consumers to mix into a liquid or incorporate into another product. If the grains are too big, they have to be re-ground, and that extends the processing time.

Before a shipment leaves Indonesia, the exporter must also meet the country's applicable trade requirements. In 2025, the Ministry of Trade announced a 351-metric-ton shipment of kratom powder under the country's new export arrangements.

The Export Industry Takes Shape

Once the dried kratom has been ground into powder, it must meet the safety standards of overseas buyers before it can enter their markets.

IIn the past, microbial contamination has caused serious problems in the kratom trade. In 2018, the US Food and Drug Administration linked kratom products to a Salmonella outbreak, which drew attention to the risks that can arise if contaminated plant material reaches consumers. Producers have adopted various approaches to increase the safety of their products. 

One way to reduce this risk is irradiation. The method exposes the product to ionizing energy that damages microorganisms. 

E-beam treatment exposes kratom powder to high-energy electrons that reduce harmful microbes. Pasteurization is sometimes used to reduce microbes, while scrupulous hygiene practices keep the equipment free from contamination at the facility. For consumers, these safeguards are essential because contaminated kratom can carry bacteria and molds that cause illness.

The chosen approach depends on the product and the buyer's specifications. 

Indonesia demonstrated how such treatment can form part of the export trade in February 2025, when it announced its first official shipment under new export rules. The consignment of kratom weighed 351 metric tons, with a total value of around $1.05 million. The powder was irradiated before it passed inspection by SUCOFINDO, an Indonesian company that conducts technical checks and laboratory tests for export goods on behalf of the government.

Overseas trade depends on more than growing a crop and grinding its leaves: producers must deliver a product that meets the rules of the country it leaves and the market it enters.

From Southeast Asian Ports to Overseas Markets

Kratom grown in Indonesian Borneo reaches American buyers mainly by sea. Before departure, exporters move the powder to major ports such as Surabaya or Jakarta’s Tanjung Priok, where cargo is prepared for its journey across the Pacific. By sea, it takes around 18–30 days to reach the USA. Companies with enough goods to fill a container can book one for their own cargo; smaller orders may travel alongside other freight under a less-than-container-load (LCL) arrangement. 

Oakland is a major point of entry for Indonesian kratom. Shipments also arrive through Los Angeles, Seattle-Tacoma, and Gulf Coast ports, including Tampa.

Air freight is sometimes used for smaller or urgent consignments, with Los Angeles International Airport (LAX) and John F. Kennedy International Airport (JFK) two of the most used arrival points.

At US ports, Customs and Border Protection handles the customs entry, and the Food and Drug Administration also inspects the goods. 

After release, the cargo is transported to the importer’s warehouse or a facility where the powder can be repackaged and subjected to third-party analysis. Some customers want the raw powder for resale; others use it as a base for products made in the United States. A manufacturer might fill capsules with the powder, while another business extracts compounds from the leaf to make a more concentrated product.

Frequently Asked Questions 

Is kratom cultivated outside Southeast Asia?

Kratom grows in other tropical regions, provided the climate is warm and humid enough. The challenge is to establish productive farms and develop the infrastructure needed for a reliable route to market. Indonesia already has experienced growers and an established export infrastructure, which give its producers a competitive edge. 

Do all kratom leaves have the same alkaloid content?

No. A tree’s age and growing conditions can affect its alkaloid levels, so leaves from the same farm may differ. Researchers also examine differences between plant varieties, although a leaf’s appearance does not tell you how much mitragynine it contains.

Does the color of kratom powder reveal how it was processed?

Not reliably. Fermentation can darken the leaf material, while exposure to sunlight and heat can also affect its color. A green or brown powder may offer a clue about its treatment, but by itself, color cannot identify the method used.

What is the difference between kratom leaf powder and kratom extract?

Leaf powder is simply the dried plant ground into small particles. The producer uses a solvent or another method to separate the desired compounds from the leaves. The result can contain a much higher concentration of alkaloids in a smaller quantity of product.

What does irradiation do to kratom powder?

Irradiation exposes kratom powder to a controlled dose of radiation that destroys harmful microbes and lowers the risk of bacterial contamination in the product you buy. It does not make the powder radioactive. Indonesian exporters used this treatment on the country’s first officially announced export shipment in February 2025, before the cargo passed inspection, but other sterilization methods are also used.

How do kratom farmers earn money from the crop?

Local traders connect kratom farmers with larger buyers and exporters, creating a route to market for their harvest. For rural communities in West Kalimantan, the crop can provide a valuable source of income, particularly where it offers better returns than alternatives such as rubber. What farmers earn depends on the price local buyers offer and the demand for kratom beyond their villages.

Can farmers harvest kratom throughout the year?

In Indonesia, established trees can produce leaves year-round. Cultivation studies report harvest intervals of around six weeks to three months, depending on the conditions and the age of the tree. Farmers do not need to replant trees after every harvest.

Does finer kratom powder contain more alkaloids?

No. Grinding changes the size of the particles, not the amount of alkaloids already present in the leaf material. A finer powder may be easier to mix into a drink or use in a manufactured product, but fineness alone says nothing about its alkaloid concentration.

How does demand for kratom affect farming communities in Indonesia?

In West Kalimantan, kratom has given farmers an alternative to rubber. A 2024 study in Saujung Giling Manik village, Kapuas Hulu, found cultivation of kratom more profitable than rubber under the local conditions. 

Kratom Sourced With Quality in Mind

Great kratom starts at the source. From the farms of Southeast Asia to your hands, quality begins long before the package is sealed. At Jack Botanicals, we believe you should expect more from your kratom: carefully sourced products, a commitment to quality, and a range that gives you plenty of choice. Discover Jack Botanicals and explore their awesome kratom collection.