Yellow kratom is the rarest kratom colour and owes its unique character to a hybrid drying process only applied in specific processing facilities in the Kapuas Hulu regency of West Kalimantan. The leaves are first shade-dried and then briefly fermented in the sun. This combines elements of both green and red processing methods and creates an alkaloid profile that merges characteristics of both colours.
Also discover our green, red and white kratom.
Yellow kratom requires a precisely timed hybrid processing method that is harder to control than standard drying or fermentation. The leaves must shade-dry for exactly the right number of hours before being briefly fermented in the sun. Too long produces red kratom, too short yields a green profile. Only a limited number of processors in Kapuas Hulu fully master this process.
Due to the hybrid drying process, yellow kratom combines the high mitragynine content of green kratom with the partial oxidation of red kratom. The result is a profile with mitragynine, a moderate level of 7-hydroxymitragynine, paynantheine and speciociliatine in a unique ratio found in no other kratom colour.
The process begins with shade-drying (12–24 hours), after which the leaves are briefly (4–8 hours) exposed to direct sunlight for controlled fermentation. Timing is crucial: processors at our facility in West Kalimantan continuously monitor colour and texture. After drying, the powder is batch-tested for alkaloid composition.
