Thailand
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| Kingdom of Thailand | |
|---|---|
| ราชอาณาจักรไทย (taɪ.lænd) (TYE-land) | |
| Capital | Bangkok (กรุงเทพมหานคร) |
| Continent | Asia |
| Gene Pool | Southeast Asian |
| Cannabis Status | |
| Legal Status | Legal only for medical use |
| Status Since | 2025 |
| Enforcement | Active, monitored. Unlicensed sale or possession may incur fines or imprisonment. |
| Documentation | |
| Growing Regions | 0 |
| Growing Areas | 0 |
| Accessions | 0 |
Thailand (Thai: ประเทศไทย, Prathet Thai [prà.tʰêːt tʰāj]) has one of the most internationally recognised cannabis traditions in Asia. Cannabis (Thai: กัญชา, gancha) was historically cultivated across central plains, northeastern plateaus and northern uplands, where monsoonal climates and consistent tropical photoperiods supported tall, late-flowering equatorial varieties. Prior to late twentieth-century enforcement, cannabis was sold openly in markets, used in folk medicine and incorporated into culinary preparations in several regions[1]
The Cannabis Act of 1934 and subsequent narcotics legislation[1] progressively criminalised cultivation and trade, with the Narcotics Act B.E. 2522 (1979) establishing strict prohibition. By the 1970s Thailand had become a major source of high-grade export cannabis, particularly the bound and cured inflorescences marketed internationally as "Thai Stick." Suppression campaigns, highland development projects and the introduction of foreign hybrid genetics reshaped cultivation landscapes during the 1980s and 1990s.
Thailand reintroduced legal medical cannabis in 2018 and temporarily decriminalised the plant in 2022, becoming the first country in Southeast Asia to do so. Regulatory restructuring since that period has generated uncertainty regarding cultivation and commercial activity. Despite Thailand's prominence in cannabis history and commerce, no coordinated national effort has catalogued or conserved indigenous Thai landrace populations. Surviving regional ecotypes remain vulnerable to eradication pressure, commercial hybridisation and the erosion of traditional agricultural knowledge. has a long history of cannabis use for medicinal, ritual, and culinary purposes.
As of today, large‑scale cultivation for medical purposes is overseen by the Thai Food and Drug Administration (FDA), while low‑THC hemp varieties are legally grown for industrial uses. Between 2022 and 2025, Thailand briefly decriminalized cannabis, allowing widespread commercial sales and public access. However, in June 2025, cannabis flowers were reclassified as a controlled herb, restricting legal use to patients with prescriptions from licensed medical practitioners. Unlicensed cultivation, sale, or possession carries penalties including fines and imprisonment.
Cannabis in Thai Culture
Vocabulary
Thai Language (Central Thai)
The word for cannabis in Centeral Thai is กัญชา (gancha), derived from Sanskrit gañjā and cognate with Hindi ganja and Khmer kaanhcha. In formal contexts, including legislation and medical regulation, the commonl yused term is "gancha".
The word กัญชง (ganchong) refers specifically to hemp, generally denoting fiber-type cannabis with low tetrahydrocannabinol (THC) content. In regulatory language after 2018, gancha and ganchong were legally distinguished based on THC percentage thresholds.
ใบกัญชา (bai gancha) means cannabis leaf and is commonly used in culinary contexts, particularly after the 2022 decriminalisation period when cannabis leaves were incorporated into beverages and soups.
ช่อดอกกัญชา (cho dok gancha) refers to the flowering inflorescence. In commercial retail settings, the English word “flower” is often used interchangeably.
The slang term กัญ (gan) is an abbreviated colloquial form used primarily among younger speakers.
Historically, the term ยาเสพติดประเภทที่ 5 (ya sēp tit praphet thi ha, “Category 5 narcotic”) referred to cannabis under the Narcotics Act B.E. 2522 (1979), the legal classification in force prior to removal from the narcotics list in 2022.
Medicinal Use
Culinary and Recreational Use
Legal History
Early Regulation
Current Legal Status
Cultivation
Growing Practices
Traditional Cultivation
Modern Prohibition-Era Cultivation
Varieties and Genetics
The Market
Supply Chain
Domestic Supply Chain
Enforcement
Institutional Framework
Arrest Trends
Growing Regions
Growing Areas
No growing areas documented yet.
Conservation Status
Historical Sources
Bibliography
- * Bourque, Andre. “Thailand’s Legalization of Medical Cannabis Proves One Very Important Thing.” Forbes, December 28, 2018. https://www.forbes.com/sites/andrebourque/2018/12/28/thailands-legalization-of-medical-cannabis-proves-one-very-important-thing/
- *Tanguay, Pascal. Cannabis Legalization in Thailand: Background to Cannabis Policy in Thailand. Global Initiative on Drug Policy Reform, 2024. PDF. https://globalinitiative.net/wp-content/uploads/2024/01/Pascal-Tanguay-Cannabis-legalization-in-Thailand-GI-TOC-January-2024.pdf
See Also
References
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