Kratom vein colours explained: green, white, red and yellow
Updated · Prozyum
Green, white, red and yellow kratom all come from the same plant, Mitragyna speciosa. The colour names refer to the colour of the leaf’s central vein at harvest and, just as much, to how the leaf is dried afterwards. They are trade categories, not different species.
What the vein is
Every kratom leaf has a central vein, or midrib, running from stem to tip. Its colour ranges from pale to green to reddish as the leaf matures. Harvesters sort leaves by that colour, which is where the names come from.
White vein
The palest vein, usually associated with younger leaves picked earlier. White vein batches are typically dried indoors and away from direct sun. Because the powder is light in colour, uneven milling shows most clearly in white vein, so it is a good test of a supplier’s sieving.
Green vein
The middle of the range: leaves with a green vein, dried in a way that keeps the colour. Green vein is the category most shops stock in the widest choice of origins.
Red vein
The most mature leaves, with a red-toned vein, often given a longer or partly sun-exposed dry. Red vein is the best-selling category in most European shops, which also means it tends to turn over fastest.
Yellow vein
Yellow is usually not a separate harvest but a drying or curing method applied to green or white vein leaf. Because the process varies so much between suppliers, yellow batches differ more from one seller to the next than the other colours do.
How to read a vein label
Treat the colour as a description of harvest and drying, and look past it for what you can verify: the origin, the mesh size, and above all a batch-specific lab report. Two green vein batches from different suppliers can differ more than a green and a red from the same one. At Prozyum every vein uses the same testing and the same sealed kilo bag, and the price follows the same kilo ladder.