Montana Hemp & Hemp‑Derived Cannabinoid Laws

This guide provides educational, state‑specific information on Montana hemp and hemp‑derived cannabinoid laws as of November 1, 2026. It is for educational purposes only and not legal advice.

Montana hemp laws: quick overview

Montana law defines “hemp” as Cannabis sativa L. and any part thereof with a total delta‑9 THC concentration of not more than 0.3% on a dry weight basis, explicitly excluding synthetic cannabinoids (MCA § 80‑18‑101, enacted 2023) ([mca.legmt.gov](https://mca.legmt.gov/bills/2024/mca/title_0800/chapter_0180/part_0010/section_0010/0800-0180-0010-0010.html?utm_source=openai)). In 2025, the legislature added per‑serving and per‑package limits: hemp products may not exceed 0.5 mg total delta‑9 THC per serving and 2 mg per package (MCA § 16‑12‑117, amended 2025) ([mca.legmt.gov](https://mca.legmt.gov/bills/mca/title_0160/chapter_0120/part_0010/section_0170/0160-0120-0010-0170.html?utm_source=openai)). Also in 2025, under MCA § 50‑31‑239, the sale of any hemp product containing total delta‑9 THC to consumers is prohibited unless the product is authorized as a food or drug by the FDA ([mca.legmt.gov](https://mca.legmt.gov/bills/mca/title_0500/chapter_0310/part_0020/section_0390/0500-0310-0020-0390.html?utm_source=openai)). Montana law also bans synthetic cannabinoids—defined per MCA § 80‑18‑101 and prohibited under § 16‑12‑117—from manufacture, processing, or sale (effective 2023) ([mca.legmt.gov](https://mca.legmt.gov/bills/2024/mca/title_0800/chapter_0180/part_0010/section_0010/0800-0180-0010-0010.html?utm_source=openai)).

Shipping guidance

Inbound shipments of hemp products into Montana must comply with state THC limits and licensing; there is no explicit state rule allowing unlicensed inbound shipments. Retailers must hold appropriate hemp grower or processor licenses. Age verification is not specified for hemp (non‑intoxicating) products.

Testing & COA guidance

Montana requires testing of hemp for Total THC (post‑decarboxylation including THCa) via the state’s USDA‑approved plan (effective January 27, 2023) under MCA Title 80, Chapter 18 and ARM 4.19. Testing is conducted at the Montana State University Analytical Lab, ISO/IEC 17025 accredited (A2LA Certificate 2694.01), using post‑decarboxylation LC and including measurement uncertainty (MU 0.0453%) (USDA‑Montana Hemp Plan, 2023) ([agr.mt.gov](https://agr.mt.gov/Hemp?utm_source=openai)). Licensees must notify the department 30 days before harvest; sampling and inspection fees apply (first covered by application, additional at $250 each) ([prod-agr.mt.gov](https://prod-agr.mt.gov/Topics/H-M/Hemp-Pages/Inspections-Sampling?utm_source=openai)).

What to buy

Allowed products include hemp flower, seed, fiber, oils, hulled seeds, hemp seed protein, hemp seed oil, and other derivatives compliant with ≤ 0.3% Δ9‑THC and per‑serving/package limits; processing requires a hemp processor license (Part A and/or B) under ARM 4.19 (2026) ([agr.mt.gov](https://agr.mt.gov/Topics/H-M/Hemp-Pages/Hemp-Questions?utm_source=openai)).

What to avoid

Avoid any hemp product exceeding 0.5 mg Δ9‑THC per serving or 2 mg per package; any product containing total Δ9‑THC unless FDA‑authorized; synthetic cannabinoids (Δ8, Δ10, HHC, THC‑A diamonds, THC‑O acetate, etc.) are banned; smokable hemp flower is not separately banned but must meet THC limits.

How to shop compliant, tested hemp

• Montana defines hemp as Cannabis sativa L. with Δ9‑THC ≤ 0.3% dry weight (MCA § 80‑18‑101, effective 2023)
• Hemp products must not exceed 0.5 mg Δ9‑THC per serving and 2 mg per package (MCA § 16‑12‑117, amended 2025)
• Any hemp product containing total Δ9‑THC is prohibited unless FDA‑authorized (MCA § 50‑31‑239, effective 2025)
• Synthetic cannabinoids (e.g., Δ8, Δ10, HHC) are banned from manufacture, processing, or sale (MCA § 16‑12‑117, 2023)
• Hemp cultivation and processing require state licenses under MCA Title 80, Chapter 18 and ARM 4.19 rules

Educational content only — not legal or medical advice.

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