A legal battle is unfolding in Missouri’s cannabis industry, blurring the lines between federally legal hemp and state-regulated marijuana. As reported by the Missouri Independent, a coalition of licensed marijuana operators has filed lawsuits against nearly 60 smoke shops and retailers across St. Louis and Kansas City. The reasoning behind the lawsuit is the sale of THCA flower—a product that looks, smells, and acts like marijuana but is currently sold outside the state’s strictly regulated dispensary system.
This legal offensive marks a significant escalation in the tension between Missouri’s licensed cannabis industry and the market for hemp-derived products. While licensed operators argue they are facing unfair competition from businesses that bypass taxes and regulations, smoke shop owners maintain they are operating legally under federal definitions established by the 2018 Farm Bill.
Unfair Competition and Uneven Playing Fields Are the Allegations
The lawsuits which can be found here and here, filed by a coalition of roughly 20 Missouri marijuana companies, accuse the retailers of selling marijuana products disguised as THCA hemp flower. The plaintiffs include licensed cultivators, manufacturers, and dispensaries who are subject to Missouri’s regulatory framework. Their central argument, as outlined in court petitions, is one of unfair competition.
Licensed marijuana facilities in Missouri face substantial financial hurdles that their unregulated counterparts do not. According to the lawsuits, cultivators pay nearly $30,000 annually in licensing fees, while dispensaries pay over $11,000.
Beyond these base fees, licensed operators must adhere to strict testing protocols, security requirements, and a “seed-to-sale” tracking system that costs millions of dollars collectively.
The plaintiffs of the lawsuit argue that Missouri smoke shops selling chemically identical products (THCA) without bearing these costs create an unsustainable economic environment. Chris McHugh, the attorney representing the coalition, stated in the Missouri Independentreport that these shops are effectively selling marijuana to anyone—including minors—without the guardrails, taxes, or guidelines that govern the legal market. The coalition is seeking not only monetary damages but also a permanent injunction to stop these retailers from marketing or selling THCA flower.
Compliance with the Farm Bill is the Defense
On the other side of the courtroom, retailers and hemp advocates argue that their operations are entirely legal. Jay Patel, a board member of the Missouri Hemp Trade Association and owner of one of the targeted stores, described the lawsuits as a baseless attempt to stomp out competition through costly litigation.
The defense hinges on the specific language of the 2018 Farm Bill, which legalized hemp federally. Under this law, hemp is defined as Cannabis sativa L. with a delta-9 tetrahydrocannabinol (THC) concentration of not more than 0.3 percent on a dry weight basis.
Retailers argue that their THCA products meet this definition because they contain low levels of delta-9 THC in their raw state. They emphasize that their products are tested to ensure compliance with this 0.3 percent threshold before they reach store shelves.
Patel noted that while the industry lacks state-imposed regulations, many members of the Missouri Hemp Trade Association have implemented self-imposed guardrails, such as age-gating restrictions.
He characterized the lawsuits as malicious, suggesting that the marijuana coalition is targeting smaller, minority-owned businesses that may lack the resources to fight a prolonged legal battle.
Understanding the “THCA Loophole”
To understand why this lawsuit is happening now, one must look at the chemistry of the plant and the legislative language governing it. The controversy centers on tetrahydrocannabinolic acid, or THCA. In raw cannabis plants, THC exists primarily as THCA, which is non-intoxicating.
However, when THCA is heated—through smoking, vaping, or cooking—it goes through a process called decarboxylation and converts into delta-9 THC, the compound that produces a “high.”
Because the 2018 Farm Bill specified a limit only on delta-9 THC, and not THCA, a market emerged for “THCA flower.” This product is standard cannabis, harvested and tested to keep delta-9 levels low, ensuring it meets the legal definition of hemp.
Once the consumer takes it home and lights it, however, the chemical conversion occurs, rendering the effects indistinguishable from marijuana sold in licensed dispensaries.
Regulators and law enforcement agencies have struggled to address this distinction. The Drug Enforcement Administration (DEA) has stated that testing should use “post-decarboxylation” methods, which would account for the total potential THC (THCA plus delta-9).
Similarly, the Cannabis Regulators Association has advised Congress that the oversight in the 2018 Farm Bill effectively legalized marijuana federally under the guise of hemp. Despite these advisory opinions, the statutory language has remained a gray area that businesses have utilized to operate.
Legislative and Regulatory Changes on the Horizon
The timing of these lawsuits is important, as both federal and state lawmakers are moving to close the perceived loophole. In late 2025, Congress passed a provision in a spending bill intended to prohibit hemp products containing more than 0.3 percent of total THC. This change will go into effect in November 2026 and effectively bans the open sale of THCA flower by requiring post-decarboxylation testing.
Simultaneously, Missouri lawmakers are debating state-level bills to address the issue sooner. One proposal would align Missouri with federal law but allow sales if Congress permits them. A competing bill proposes an immediate ban with an emergency clause, treating intoxicating hemp products the same as marijuana regardless of future congressional action.
The plaintiffs in the current lawsuits argue they cannot wait for these legislative fixes to take effect, they contend that every day these THCA products remain on Missouri shelves represents lost revenue for the state and the licensed industry, as well as a public safety risk due to the lack of mandatory testing for contaminants like pesticides or heavy metals.
The Future of the THCA Market in Missouri After Lawsuits
As the legal proceedings move forward, the outcome will likely set a precedent for how Missouri handles the intersection of hemp and marijuana. If the courts grant the marijuana companies’ injunction, they could force dozens of retailers to immediately pull popular products from their shelves.
On the other hand, if the courts find that the retailers are compliant with current laws, the status quo may continue until the new federal definitions take hold in late 2026.
For now, the consumers remain caught in the middle of a high-stakes industry battle. With one side claiming the moral high ground of regulatory compliance and the other waving the banner of federal legality, the distinction between “hemp” and “marijuana” in Missouri has never been more contentious—or more confusing.
