What Is GACP and Why Does It Now Decide Who Survives?

GACP, good agricultural and collection practice, is the cultivation standard that Thai growers must meet to legally supply the medical channel. It has quietly become the most important gatekeeper on the supply side, because a grower without certification is effectively locked out of legally supplying dispensaries, no matter how good their product. Certification, not just a license, now decides who survives on the cultivation side.

What GACP is

GACP is a quality and safety standard for how cannabis is grown, handled, and collected. In the medical framework, supplying licensed dispensaries requires product from certified sources. It is the mechanism that ties the supply chain to a defined standard, and it is central to how the legal market controls what reaches patients.

Why it became a gatekeeper

As the framework tightened, certification moved from a nice-to-have to a requirement for legal-channel access. That created a sharp divide: a limited number of certified farms can legally supply the medical market, while a much larger uncertified base cannot, at least not legally. Scarcity of certified, legal-channel supply is now a defining feature of the market.

What it means for the market

This divide shapes pricing, supply security, and where value concentrates. Certified growers hold a structural advantage; the uncertified are pushed toward the grey market or out. For anyone assessing the supply side, certification status is one of the most important variables, and the number of certified farms relative to demand is a question our report addresses directly.