One large international seed retailer says on its own Thailand page that “Thailand does not offer that clarity”, that “importing or exporting seeds carries legal risk”, and that “online claims about ‘fully legal’ seed sales are often outdated.” When a retailer talks itself out of a sale, that is good evidence that the confident claims online need checking. This article does not tell you that buying seeds in Thailand is legal or illegal. It sets out what the Thai instruments cover, where seed fits, what the official import route looks like, and which popular claims have nothing behind them.
1. Three claims to distrust
“Cannabis seeds are fully legal in Thailand.” This is overstated. Seed falls outside the controlled-herb rules (Section 3). That does not mean the law positively allows buying, importing and using it.
“You can order seeds online and they will arrive.” Whether a parcel arrives tells you about enforcement, not about the law. A parcel that skips the import conditions in Section 4 does not become lawful because it arrived.
“Seeds are legal, therefore growing is legal.” This does not follow. Cultivation is regulated separately.
2. What the Thai instruments cover
Three instruments matter, and what matters most about all three is their scope.
Notification of the Ministry of Public Health Re: Controlled Herbs (Cannabis) B.E. 2568, issued 26 June 2025 under the Protection and Promotion of Thai Traditional Medicine Knowledge Act B.E. 2542. What it makes a controlled herb is ช่อดอกกัญชา, the inflorescence. Flower may be dispensed only against a prescription on form PT 33 from an authorised practitioner. Each prescription covers no more than 30 days and can be used once, with no refills. Flower that is sold or exported must come from a GACP-certified cultivation site. Online sale and advertising of flower are banned, and recreational use is not permitted. [verified — as reported by Tilleke & Gibbins, Thailand’s New Cannabis Controls Impact Doctors, Dispensaries, and Growers - Tilleke & Gibbins]
Ministerial Regulation on Controlled Herbs (No. 2) B.E. 2569, in force 30 April 2026. It tightens licensing. The key point here is that it is reported to apply only to cannabis inflorescence, so other plant parts stay under the 2559 licensing rules. [verified as reported — New Thailand Cannabis Law Published on April 30, 2026: Ministerial Regulation on the Permission for Study, Research, or Export of Controlled Herbs, or Sale, or Processing of Controlled Herbs for Commercial Purposes (No. 2) B.E. 2569]
Ministerial Regulation on Cannabis or Hemp Extracts B.E. 2569, in force 26 April 2026. It governs extracts above 0.2% THC, which remain Category 5 narcotics. It allows four purposes and bars foreign-controlled entities. [verified as reported — Thailand’s new cannabis-hemp extract rules take effect, limiting use to four purposes – Asia News Network]
Neither 2026 regulation changes the PT 33 prescription rules. We could not read the Royal Gazette originals. All three citations come from law-firm and press reports.
3. Where seed sits
Seed is not inflorescence. The controlled-herb rules cover the flower. Seed is a different plant part.
Hemp seed is an approved food ingredient. Notification of the Ministry of Public Health (No. 425) B.E. 2564, issued under the Food Act B.E. 2522, covers hemp seed, hemp seed oil, hemp seed protein and foods that contain hemp seed. It sets THC and CBD limits and requires the hemp seed used to be lawfully acquired. [verified — Thai FDA English translation, https://exfood.fda.moph.go.th/law/data/announ_moph/P425_E.pdf] So seed as a commodity is not banned outright. It has a regulated food pathway.
Two things do not follow from that.
Seed not being a controlled herb does not make growing from it lawful. Cultivation is regulated separately, and a lawful seed does not make a lawful grow. Online pages mix these two up more than anything else. Fee figures for a so-called “home-growing licence” circulate without any official source. Confirm the current cultivation route, and any fee, with DTAM before you plan.
The online-sale ban covers flower; whether it applies to seed has not been confirmed.
4. Importing seed: the plant-quarantine route
The Department of Agriculture (DOA) regulates seed imports under the Plant Quarantine Act B.E. 2507 (1964). A DOA notification from 2022 (B.E. 2565) allows cannabis and hemp (Cannabis sativa) seed for sowing to be imported from any country, subject to conditions. [verified — DOA English translation, https://www.doa.go.th/plprotect/wp-content/uploads/2023/11/Thailand-Import-Conditions-on-Cannabis-and-Hemp-Cannabis-sativa-seed_EN.pdf; reported by Thailand legalises importation of cannabis and hemp seeds]
The conditions, as published and reported:
- An import permit from the DOA, obtained before the seed is shipped. [as reported — Thai PBS World, 20 September 2024, https://old.thaipbsworld.com/?p=299531]
- A phytosanitary certificate issued by the plant protection organisation of the exporting country.
- The seed must not be genetically modified and must be free of soil, insects and other contaminants.
- Inspection on arrival. Seed that does not match its documents can be destroyed.
- A September 2024 DOA change reportedly allows seed to enter by air, sea or land, where before it was air only, and drops the fungicide-treatment requirement. We could not read the text of that amendment. [as reported — Thai PBS World, same source]
It is not confirmed whether the Thai FDA or DTAM adds its own requirement for importing cannabis seed. Ask before you import.
Importing seed without a DOA import permit and a phytosanitary certificate risks seizure and prosecution. An ordinary cross-border mail-order parcel arrives with neither. Contacts: DOA plant quarantine, https://www.doa.go.th/plprotect/; Thai FDA, https://www.fda.moph.go.th; DTAM, https://www.dtam.moph.go.th.
5. What to do with an unresolved question
Ask DTAM, the Thai FDA and the DOA in writing. This is the only authoritative route. One written answer is worth more than every page cited in this article.
Ask a Thai lawyer if the amount at stake justifies it. For a commercial seed business, it clearly does.
Do not treat a retailer’s legality page as legal advice, including the cautious one quoted above.
Separate the three questions and answer them one at a time. Is possessing seed lawful? Is importing it lawful? Is growing from it lawful? Import now has a documented DOA route. The other two questions still need a written answer from the regulator.
Keep your paperwork if you grow under licence. Whatever the position on seed, cultivation is what gets licensed, and licensed cultivation is what gets inspected.
Watch the draft Act. Cabinet approved the draft Cannabis Control Act on 22 September 2026 and sent it to the House. It is still a draft, not law. Press reports say it would limit cannabis to medical use, require cultivation plots to be registered, and bring tougher penalties. [verified as reported — Thai cabinet endorses draft cannabis control bill for medical use] The exemption for roots, branches, stems, leaves and seeds is still only reported in the draft. That report dates from before Cabinet approval (Thai Examiner, 2 August 2026, New cannabis control law expected to be brought to cabinet. It will control and outlaw recreational use - Thai Examiner), so it needs checking against the version sent to the House.
6. What we could not verify
- Any DTAM or Thai FDA statement specifically about buying or possessing cannabis seed. [unverified]
- The Royal Gazette originals of the three cannabis instruments, and the text of the September 2024 DOA amendment. All of these come from law-firm and press reports.
- Whether any Thai FDA, DTAM or narcotics rule adds a seed-import requirement beyond the DOA conditions. [unverified]
- Any current cultivation licence fee. [unverified]
- Whether any enforcement action has been taken over seed specifically. We found none reported. No reported enforcement does not mean something is legal. [unverified]
Has anyone here asked DTAM or the Thai FDA about seed in writing and received an answer? Or applied for a DOA import permit for cannabis seed? Either document would settle more than every page cited in this article. And if anyone growing under licence has had their seed source questioned at an inspection, that is the practical test of where the line sits.
Related reading: topics 1330, 267 and 50.
This article is a summary of published regulations and reporting and is not legal advice. The authoritative sources are the Royal Gazette, the Department of Thai Traditional and Alternative Medicine, the Thai FDA and the Department of Agriculture. Gazette citations here come from law-firm and press reports, not the originals. Confirm anything here with the regulator or a qualified Thai lawyer before acting on it.