Is THCA Legal in Colorado? | 2025 State Cannabis Law Update

Colorado’s THCA Regulation Overview

Colorado has one of the most mature cannabis markets in the U.S., but it recently imposed “total THC” limits that make hemp-derived THCA flower effectively illegal for retail sale within the state.


Why THCA Is Restricted in Colorado

Under SB23-271, effective June 7, 2023, hemp products in Colorado must:

  • Contain no more than 1.75 mg of THC per serving, and

  • Maintain a CBD:THC ratio of at least 15:1

Because THCA converts into THC when heated, high-THCA hemp flower easily exceeds this threshold, even if it remains federally compliant under the 2018 Farm Bill. As a result, THCA flower cannot be sold legally in Colorado retail stores.


Federal vs. State Law

Federally, hemp-derived THCA is still legal if Δ9-THC ≤ 0.3% dry weight, but Colorado’s “total THC” law overrides this standard at the state level.
The state’s definition of THC includes:

“The substance contained in the cannabis plant or any carboxylic acid, derivative, isomer, or salt of these substances.”

This means THCA counts toward total THC, classifying it as potentially intoxicating under state law.


Is THCA a Controlled Substance in Colorado?

No. Colorado’s hemp statutes removed THCA from the controlled substances list, but the state restricts its retail sale under hemp product standards. Consumers may still legally purchase marijuana-derived THCA products through licensed dispensaries.


What This Means for Consumers

  • THCA hemp flower: Not legal for sale in-state.

  • Hemp-derived THCA shipped from out of state: Still protected federally, but risky under Colorado enforcement.

  • Marijuana-derived THCA: Available only in licensed dispensaries for adults 21+.

If laws evolve, THCA Nugs will continue offering lab-tested, federally compliant THCA flower nationwide - always below 0.3% Δ9-THC and verified by third-party COAs.


Science Behind THCA

Peer-reviewed studies in Frontiers in Pharmacology show THCA may exhibit anti-inflammatory, anti-nausea, and neuroprotective properties. Though non-psychoactive until heated, THCA remains one of hemp’s most promising natural cannabinoids.


Final Word

THCA is not currently legal for retail sale in Colorado due to the state’s total THC limits. However, hemp-derived THCA remains federally protected under the 2018 Farm Bill when Δ9-THC stays below 0.3%.
Consumers seeking THCA’s benefits should source from federally compliant, COA-verified brands such as THCA Nugs.