Minnesota's SF 3591 THC Cap Bill: What It Would Mean for Dispensary Shoppers in 2026
Minnesota lawmakers are debating a bill that would cap the potency of cannabis products sold in the state's adult-use dispensaries -- and the proposal has sparked sharp pushback from an industry already struggling with supply shortages and testing delays.
Senate File 3591, introduced on February 17, 2026, by State Senator Matt Klein (DFL, District 53), would set maximum THC limits for every category of cannabis product sold through Minnesota dispensaries. If enacted, the bill would represent one of the most significant regulatory changes to Minnesota's cannabis market since legalization took effect in 2023.
Here is what the bill proposes, who opposes it, and what it would mean if you buy cannabis in Minnesota.
What SF 3591 Would Do
The bill establishes specific potency ceilings for three categories of products:
Cannabis flower: No more than 15% total THC. This applies to all smokable flower, including pre-packaged buds and loose flower sold at dispensaries.
Cannabis concentrates: No more than 30% total THC. This covers vape cartridges, wax, shatter, rosin, live resin, and other extracted products.
Topical and transdermal products: No more than 500 milligrams of total THC per package. This applies to creams, patches, and similar products.
The bill would also ban certain product types outright. Under SF 3591, cannabis flower or pre-rolls that have been infused with additional THC or other psychoactive cannabinoids would no longer be allowed for sale through adult-use dispensaries. Products shaped like lollipops, ice cream, candy, gummy bears, or other items associated with children would also be prohibited, reinforcing existing rules that already ban cannabis products designed to appeal to minors.
Beyond potency, the bill imposes new warning requirements at the retail level. Every dispensary would be required to post notices linking cannabis smoke to increased risk of heart and lung disease, warning about psychotic symptoms and mental health risks for users under 25, and cautioning about the delayed onset of edibles. Product packaging would need to include expanded warning statements covering brain development concerns, dependence risk, psychosis, pregnancy, and driving under the influence.
The bill has been referred to the Senate Commerce and Consumer Protection Committee, which happens to be chaired by Senator Klein himself. That committee assignment gives the bill a clearer path to a hearing than most legislation receives in an early-session introduction.
Who Is Behind the Bill
Senator Matt Klein represents District 53, which covers parts of South St. Paul and Inver Grove Heights. He is a physician by training, and his stated rationale for the bill centers on public health -- particularly protecting developing brains among young adult users and reducing the risk of cannabis-induced psychotic episodes.
Klein is also running for Congress in 2026, which adds a political layer to the proposal. Critics within the cannabis industry have noted that the bill's headline numbers -- 15% for flower, 30% for concentrates -- would resonate with a general electorate concerned about high-potency cannabis even if those numbers are considered extreme by industry standards.
No co-authors have been announced as of publication.
Why 15% Is a Low Bar for Minnesota Flower
To understand what a 15% THC cap would mean in practice, it helps to look at what Minnesota dispensaries currently stock.
Minnesota's licensed cultivators have been growing cannabis for a market where consumers -- many of them migrating from the unregulated market -- expect flower in the 20% to 30% THC range. That is the standard across most adult-use states. Strains currently available at Minnesota dispensaries like RISE, Green Goods, and Frostbite regularly test between 20% and 28% THC, with some premium options reaching higher.
A 15% cap would remove the majority of flower currently sold at Minnesota dispensaries from legal sale. Cultivators would need to either develop lower-potency strains or reformulate existing genetics to come in under the limit. Either path takes time and investment that the market -- still in its first full year of adult-use retail -- is not positioned to absorb quickly.
For concentrates, a 30% cap is similarly restrictive. Most vape cartridges sold at licensed dispensaries run between 70% and 90% THC. Live resin and full-spectrum extracts typically land in the 60% to 80% range. A 30% cap would effectively ban the entire concentrate category as currently constituted in Minnesota's legal market.
What the Industry Is Saying
Minnesota cannabis operators have responded to SF 3591 with strong opposition, and the reasons they cite go beyond protecting their own product lines.
The central argument from the industry is that artificially low potency limits will push consumers back toward the unregulated market. Minnesota's unlicensed market -- which operated for years before legalization and continues to function in areas without nearby dispensaries -- is not bound by any potency restrictions. Consumers accustomed to 25% flower or high-potency concentrates who cannot find comparable products at licensed dispensaries have a ready alternative.
Industry leaders have also pointed out that Minnesota's legal market is still fragile. As of February 2026, the state has issued 96 adult-use retail licenses, but fewer than half of those locations are fully operational. Wholesale prices are running above $4,500 per pound due to limited cultivator supply. Testing backlogs are adding six weeks or more to the time it takes to get new products on shelves. Layering a potency cap on top of an already strained supply chain could accelerate consolidation and reduce the number of viable cannabis businesses before the market has a chance to mature.
The comparison to other states is also worth noting. Among adult-use states, very few have implemented strict THC caps on cannabis flower. Vermont restricts flower to 30% THC and concentrates to 60%. Some medical-only states set lower limits, but those programs are designed for a different population with different consumption needs. A 15% flower cap would put Minnesota significantly below every other adult-use state in the country.
The Testing Bill Running in Parallel
SF 3591 is not the only cannabis legislation moving through the 2026 session. A separate testing bill advanced to a committee hearing on February 24, 2026, one day before this article was published.
That bill, carried by DFL Senator Lindsay Port, addresses the testing backlog that has become one of the biggest obstacles to getting licensed Minnesota cannabis onto store shelves. With only two fully operational state-licensed testing labs -- Legend Technical Services in St. Paul and one other facility -- cultivators are waiting six weeks or more for results. The backlog delayed the first legal sale of flower from a new state-licensed cultivator until February 12, 2026, after a seven-week testing wait.
Senator Port's comment at the February 24 hearing captured the tension in Minnesota's market right now: "The backlog is in testing right now, but I think we're going to see, within the next few months, really a growing, blossoming array of products available around the state," she told MPR News.
The testing bill and SF 3591 are moving through different committees, but they reflect the same underlying dynamic: Minnesota's cannabis market is still in its early stages, regulators and legislators are actively shaping its rules, and business owners are trying to plan against a moving target.
What the Current Law Allows
It helps to know where things stand under existing Minnesota law before evaluating what SF 3591 would change.
The 2023 Cannabis Act that legalized adult use in Minnesota did not include THC potency limits on flower or concentrates sold through licensed dispensaries. That was an intentional omission. The legislature chose to set possession limits and packaging requirements rather than micromanage potency.
Hemp-derived products sold through unlicensed retailers -- gas stations, convenience stores, specialty shops -- face different rules under the state's hemp retail framework. Those products are capped at 5 milligrams of THC per serving, 50 milligrams per package. The March 31, 2026, deadline for hemp retailers to come into compliance with new testing and labeling rules is already creating disruption in that segment.
Dispensary cannabis products currently operate without potency maximums. SF 3591 would change that.
If the Bill Becomes Law
The timeline for SF 3591 depends on how quickly it moves through committee. With Klein chairing the Senate Commerce and Consumer Protection Committee, the bill has an unusual advantage: the author controls the hearing schedule.
However, the bill would still need to pass the full Senate, clear the House, and be signed by the governor. The 2026 session has a committee deadline system, and the bill would need to meet those cutoffs to advance. As of late February 2026, no House companion bill has been filed.
If the bill passes, implementation timelines would matter enormously to the industry. A short compliance window -- say, 90 days -- would force cultivators and manufacturers to pull products from shelves or destroy existing inventory. A longer grandfather period for products already tested and in the supply chain would ease the transition but extend the period of uncertainty for consumers and operators alike.
The cannabis industry is watching the Commerce and Consumer Protection Committee closely. Testimony from dispensary owners, cultivators, and patient advocates is expected to play a significant role in how committee members receive the bill.
What Minnesota Cannabis Consumers Should Know
If you shop at a Minnesota dispensary, here is the practical picture right now:
SF 3591 has been introduced but has not passed. Every product currently on the shelves at licensed Minnesota dispensaries is legal under current state law. Nothing changes until -- or unless -- the bill advances through the full legislative process and is signed into law.
That said, the bill's introduction is a signal that potency regulation is on the legislature's agenda. Consumers who rely on high-potency products for medical reasons -- pain management, nausea, or sleep, for example -- may want to follow this legislation through the 2026 session.
Minnesota's licensed dispensaries are required to display all product testing information, including THC percentage, on packaging. Asking your budtender about the potency of the products you buy is always a reasonable step regardless of what the legislature does.
Frequently Asked Questions
What is Senate File 3591? SF 3591 is a Minnesota bill introduced on February 17, 2026, that would cap THC at 15% for cannabis flower, 30% for concentrates, and 500 milligrams per package for topicals sold at adult-use dispensaries. It was introduced by State Senator Matt Klein of District 53.
Would SF 3591 affect hemp products sold at gas stations and convenience stores? No. Hemp retail products sold outside of licensed dispensaries are regulated under a separate framework with a 5-milligram-per-serving cap. SF 3591 applies to licensed adult-use dispensary products only.
Is SF 3591 likely to pass? It is early in the process. The bill has been referred to committee but has not yet had a hearing. No House companion bill has been filed. Industry opposition is strong. The bill's path to becoming law is uncertain.
What do most Minnesota dispensaries sell in terms of flower THC? Most licensed Minnesota dispensaries currently sell flower that tests between 20% and 30% THC. A 15% cap would require most dispensaries to significantly change their product mix.
How does Minnesota compare to other states on THC caps? Minnesota currently has no THC cap on dispensary cannabis products. Among adult-use states that have enacted limits, Vermont caps flower at 30% and concentrates at 60%. A 15% flower cap, if enacted, would be the most restrictive potency limit among adult-use states in the country.
Where can I follow the progress of SF 3591? The Minnesota Legislature tracks all bill activity at revisor.mn.gov. Hearing dates will be posted through the Senate Commerce and Consumer Protection Committee.
Will existing high-THC products be pulled from shelves immediately if the bill passes? That would depend on the implementation language in the final bill. Any grandfather period for existing inventory would be negotiated during the legislative process and may not be determined until a final version of the bill passes.
Related Reading
- Minnesota Cannabis Testing Backlog: 6-Week Delays Hitting Dispensary Shelves
- After Anoka, 12 More Minnesota Cities Are Racing to Open Municipal Cannabis Dispensaries
- THC Drinks in Minnesota: Your Complete 2026 Guide
- Minnesota Cannabis Possession Limits: What You Can Legally Carry
- Find a Dispensary Near You
