Is THCA flower legal in Minnesota?

THCA flower is not legal as hemp in Minnesota but is legal as marijuana.

This is due to Minnesota’s Total THC standard, which includes THCA in the 0.3% THC limit for hemp products.

If you're trying to figure out whether you can legally purchase THCA flower in Minnesota, the answer depends on how it’s categorized and sold. Let's break it down clearly.

What Is THCA Flower?

THCA flower is cannabis flower high in Tetrahydrocannabinolic Acid (THCA), a non-psychoactive compound that converts into Delta-9 THC when heated.

Once heated, THCA transforms into the intoxicating compound responsible for the traditional cannabis "high."

Because of this conversion, THCA flower closely resembles marijuana in both effect and chemical structure.

Is THCA Flower Legal in Minnesota?

THCA flower is only legal in Minnesota if sold through licensed marijuana dispensaries.

Legal When:

• Purchased at a state-licensed cannabis dispensary
• Marketed and labeled as marijuana
• Bought by individuals 21 years or older

Illegal When:

• Sold as hemp flower with THCA content over 0.3%
• Labeled as a hemp-derived product but exceeds Total THC limits
• Purchased from unlicensed online vendors

The Impact of Minnesota Statute 151.72

Minnesota Statute 151.72, revised in 2022, governs all hemp-derived cannabinoid products.

The law:

• Includes THCA in the THC limit calculation
• Requires hemp products to contain no more than 0.3% Total THC (Delta-9 + THCA and other isomers)
• Reclassifies any product exceeding this threshold as marijuana

Because most THCA flower exceeds 10% THCA, it does not qualify as hemp under Minnesota law.

Federal vs. State Law: A Crucial Difference

The 2018 Farm Bill allows hemp-derived THCA flower federally if Delta-9 THC remains under 0.3%.

However, Minnesota does not follow this interpretation.

Instead, the state calculates Total THC using the formula:

Total THC = (Delta-9 THC) + (0.877 × THCA)

This formula causes most THCA flower to exceed the hemp limit, making it illegal as hemp but legal as marijuana.

Can You Buy THCA Flower in Minnesota?

Yes—but only through licensed dispensaries.

As of August 1, 2023, Minnesota legalized adult-use cannabis.

Adults 21+ can legally purchase THCA flower labeled as marijuana from a state-authorized dispensary.

Can You Order THCA Flower Online in Minnesota?

You can legally order THCA flower online only from licensed Minnesota marijuana dispensaries.

Ordering from out-of-state or unlicensed hemp retailers poses a legal risk, as their products may exceed Minnesota’s Total THC limit.

THCA Possession Limits in Minnesota

Adults 21 and over may legally possess:

• Up to 2 ounces of cannabis flower (including THCA flower) in public
• Up to 2 pounds at home

Possessing more than the allowed amount may result in penalties under state law.

What Are the Legal Risks of THCA Flower?

The biggest risk is mislabeling.

Many online vendors market high-THCA flower as hemp, even though it's considered marijuana under Minnesota law.

To protect yourself:

• Always check for a Certificate of Analysis (COA)
• Confirm Total THC does not exceed 0.3% if labeled as hemp
• Only purchase high-THCA products as marijuana, not hemp

Is THCA a Controlled Substance in Minnesota?

No, THCA is not a controlled substance when part of a compliant hemp product (≤ 0.3% Total THC).

However, high-THCA flower rarely meets this requirement, making it functionally regulated as cannabis.

Final Answer: Is THCA Flower Legal in Minnesota?

THCA flower is illegal when sold as hemp in Minnesota due to the state’s Total THC standard.

It is legal when sold as marijuana by licensed dispensaries to adults 21 and older.

If you're buying THCA flower in Minnesota, make sure it's sold and labeled as cannabis—not hemp—to stay within the law.