Missouri has taken a welcome step toward allowing cannabis businesses to participate in a national market for plant genetics. On October 21, 2026, the Missouri Division of Cannabis Regulation (DCR) issued a variance and accompanying guidance allowing licensed marijuana cultivators to acquire certain cannabis plants and genetic material from businesses outside Missouri’s regulated marijuana system.

The change takes effect November 12, 2026, and could have implications well beyond Missouri. If other states adopt similar policies, it could open new opportunities for cannabis breeders, tissue culture laboratories, clone producers, and licensed cultivators throughout the country.

Generally speaking, I think this is a positive development, although Missouri’s new rules contain a limitation concerning cannabis seeds that should be addressed.

What Missouri Is Changing

Historically, state-regulated marijuana markets have operated as isolated systems. Licensed growers must cultivate marijuana within their own states, and restrictions on bringing outside cannabis material into licensed facilities can make acquiring new genetics difficult. Missouri’s new guidance addresses this problem.

The DCR issued a variance to 19 CSR 100-1.160(1)(A)2, allowing licensed marijuana cultivators to acquire plants, seeds, tissue cultures, and other genetic material containing no more than 0.3% total THC from entities outside Missouri’s regulated cannabis cultivation system, provided the transactions comply with other applicable laws.

The change follows Missouri’s enactment of House Bill 2641, which establishes a new statutory definition of hemp based on total THC, including THCa.

The DCR’s guidance establishes several important rules:

• Small plants and clones. Cannabis plants measuring less than two inches above the root are presumed to contain no more than 0.3% total THC. This creates an opportunity for licensed cultivators to acquire small clones from outside Missouri’s licensed marijuana system. 
• Larger plants. Plants exceeding two inches are presumed to be marijuana unless testing establishes that their total THC concentration is within the permissible limit. 
• Tissue cultures and other genetic material. Compliant tissue cultures, pollen, and other genetic material may be acquired from outside suppliers, subject to applicable law.
• Tracking. All acquired plants and genetic material must be entered into Missouri’s statewide track-and-trace system on the day they are received.

Importantly, this is not authorization to import marijuana for resale. Missouri still requires marijuana sold in its regulated market to originate from plants grown and cultivated in a Missouri-licensed cultivation facility. The new policy allows qualifying genetics to enter that system, where subsequent cultivation must occur under Missouri’s regulatory requirements. Of course, the variance also does not override federal law or authorize unlicensed suppliers to cultivate marijuana.

An Important Exception: Cannabis Seeds

The new guidance contains a significant limitation concerning seeds.

Under Missouri’s new statute, viable seeds from cannabis plants containing more than 0.3% total THC are excluded from the definition of hemp, regardless of how little THC the seeds themselves contain.

This represents a departure from the approach DEA articulated in a 2022 letter concluding that cannabis seeds containing no more than 0.3% delta-9 THC qualified as hemp under the federal law then in effect.

I discussed that DEA interpretation and its potential legal pitfalls in my earlier article, DEA Seed Letter: Triumph or Trap?

Missouri’s new guidance states that seeds originating from high-THC marijuana plants cannot be acquired from outside the state’s licensed cultivation system. It also contains a broader statement that seeds from unlicensed entities will no longer be permitted, despite the variance itself referring to the acquisition of qualifying seeds from outside suppliers. This discrepancy needs clarification from DCR.

The practical concern is that the new policy may allow certain small clones or tissue cultures to enter Missouri while prohibiting seeds from the same genetic lineage based on the THC concentration of their parent plants. This limitation is particularly important for breeders and seed companies whose products. It also illustrates why the legal treatment of cannabis genetics, including seeds, remains unnecessarily complicated.

What Would Happen If Other States Adopted This Approach?

The potential implications for the national cannabis genetics industry are substantial. Successful cultivation depends on access to desirable genetics, including plants selected for cannabinoid profiles, terpene expression, disease resistance, yield, and other characteristics. Yet state marijuana regulations frequently restrict the movement of genetic material between licensed markets. This limits the ability of breeders and cultivators to work together and makes it difficult for growers to obtain desirable strains developed elsewhere.

If more states adopted an approach similar to Missouri’s, several changes could follow:

First, a more competitive national genetics market could develop. Breeders and propagation businesses could supply qualifying plant material to licensed marijuana cultivators in multiple states rather than being limited to customers within their own state systems. Growers would have more choices, and specialized genetics companies could serve a broader market.

Second, tissue culture could become an increasingly important part of the cannabis supply chain. Tissue culture allows businesses to preserve and propagate valuable genetics in a controlled environment. With appropriate procedures, it can also help reduce the introduction of pathogens and other problems associated with conventional propagation. A regulatory system that permits compliant tissue cultures to move between states could create significant opportunities for specialized laboratories and breeders.

Third, a national clone market could become more viable. Missouri’s presumption that plants under two inches satisfy the THC threshold provides a potential pathway for moving small, qualifying plants into licensed cultivation facilities. If other states adopted comparable rules, businesses could develop specialized propagation operations serving cultivators in multiple jurisdictions. (Two inches is a little short, though, in my opinion.)  The resulting market could also support more sophisticated licensing arrangements involving proprietary genetics, breeding agreements, and intellectual property rights.

These changes would not eliminate the need for state marijuana licensing. Instead, they would permit a more open market for qualifying genetic inputs while maintaining state oversight of marijuana cultivation and finished products. A national genetics market could therefore develop without requiring states to abandon their existing systems for regulating marijuana production and sales.

The Seed Problem Could Hold Back the Market

Missouri’s treatment of seeds is a frustrating piece of the new framework. If other states adopt comparable restrictions, the national market could become divided between genetic material that may move across state lines and seeds that cannot, even when those seeds contain negligible THC. This would be a significant problem for the cannabis breeding industry.

Seeds are essential to developing new cannabis varieties. Unlike clones, which reproduce existing genetics, seeds are a primary means of creating new genetic combinations. A system that restricts seed commerce based on the THC concentration of the parent plant could discourage breeding activity and make it more difficult for cultivators to obtain new varieties.

Additionally, requiring proof of a parent plant’s THC concentration could create substantial documentation problems for seed suppliers, particularly when dealing with older genetics or international breeding programs.

This is not merely a Missouri issue. Congress’s recent amendments to the federal definition of hemp also contain an exclusion for viable seeds originating from plants exceeding the specified total-THC threshold. Those federal provisions are scheduled to take effect December 11, 2026. Consequently, any national framework for cannabis genetics must account for federal restrictions as well as the different requirements imposed by individual states.

A workable national system should not create unnecessary barriers to legitimate breeding and research. Missouri’s decision to permit additional forms of genetic material to enter its licensed market is a step in the right direction, but its treatment of seeds leaves considerable room for improvement.

My Take: This Is Progress, and We Need More of It

I have long argued that our cannabis laws should focus on legitimate public health and safety concerns rather than artificial distinctions between hemp and marijuana or unnecessary barriers between state markets. Missouri’s decision to permit licensed cultivators to acquire qualifying genetics from outside its regulated marijuana system is a positive development. Growers should have access to the best available plant genetics and a regulated cannabis market does not need to be isolated from the rest of the country.

I would like to see other states adopt similar policies while eliminating the unnecessary restrictions on cannabis seeds. Ultimately, of course, marijuana should be removed from the federal Controlled Substances Act, and cannabis businesses should be allowed to participate in normal interstate commerce subject to reasonable regulation. Missouri’s new variance is flawed, but it points in the right direction. We need more of this kind of practical reform.

October 26, 2026

Rod Kight (opens in new tab)is an international cannabis lawyer. He represents businesses throughout the cannabis industry. Additionally, Rod speaks at cannabis conferences, drafts and presents legislation to foreign governments, is regularly quoted on cannabis matters in the media, and is the editor of the Kight on Cannabis legal blog, which discusses legal issues affecting the cannabis industry. You can schedule a call with him by clicking here(opens in new tab).