Montana Hemp & Hemp‑Derived Cannabinoid Laws

This guide provides educational, state‑specific information on Montana hemp and hemp‑derived cannabinoid laws as of October 8, 2026. It is for educational purposes only and not legal advice.

Montana hemp laws: quick overview

Montana law defines hemp as Cannabis sativa L. with total delta‑9 THC not exceeding 0.3% on a dry weight basis, per MCA § 80‑18‑102 (2019) and § 80‑18‑101 (2023) (effective 2019 and amended 2023) ([mca.legmt.gov](https://mca.legmt.gov/bills/2019/mca/title_0800/chapter_0180/part_0010/section_0020/0800-0180-0010-0020.html?utm_source=openai)). Processed hemp products are further restricted: under MCA § 16‑12‑117 (enacted via HB 948, effective May 22, 2023), hemp products may contain no more than 0.5 mg total delta‑9 THC per serving and 2 mg per package; unadulterated hemp flower is exempt ([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)). Additionally, synthetic cannabinoid products—including Δ8‑THC, Δ10‑THC, HHC, THC‑O, etc.—are prohibited under the same statute ([revenue.mt.gov](https://www.revenue.mt.gov/card/cannabis/education/synthetic-marijuana-product-changes?utm_source=openai)). Montana operates a USDA‑approved State Hemp Program (effective January 27, 2023) under MCA Title 80, Chapter 18 and ARM 4.19.101‑202, requiring licensing for cultivation and processing ([prod-agr.mt.gov](https://prod-agr.mt.gov/Hemp?utm_source=openai)).

Shipping guidance

Inbound shipments of compliant hemp are allowed. Hemp operators must hold a valid Montana Department of Agriculture hemp grower or processor license. No state‑specific age verification for hemp shipments is mandated beyond general consumer protection laws; synthetic cannabinoid products are banned and must not be shipped.

Testing & COA guidance

Montana requires sampling and testing per its USDA‑approved State Hemp Plan and ARM rules. Producers must notify the Department at least 30 days before harvest; samples are taken within three weeks pre‑harvest. Testing includes total THC; labs must follow state procedures (ISO 17025 not explicitly stated). Certificates of analysis must be retained; non‑compliant lots must be destroyed ([agr.mt.gov](https://agr.mt.gov/Topics/H-M/Hemp-Pages/Inspections-Sampling?utm_source=openai)).

What to buy

State‑legal products include unadulterated hemp flower (≤ 0.3% Δ9‑THC), hemp seed, fiber, oil, hulled seed, hemp‑derived extracts and derivatives that comply with Δ9‑THC limits and per‑serving/package thresholds.

What to avoid

Avoid synthetic cannabinoid products (e.g. Δ8, Δ10, HHC, THC‑O, THCA diamonds) — these are prohibited. Also avoid processed hemp products exceeding 0.5 mg Δ9‑THC per serving or 2 mg per package. Smokable hemp flower is legal if unadulterated and within THC limits.

How to shop compliant, tested hemp

• Hemp must contain ≤ 0.3% Δ9‑THC dry weight per MCA § 80‑18‑102 (2019) and § 80‑18‑101 (2023) definitions.
• Processed hemp products limited to ≤ 0.5 mg Δ9‑THC per serving and ≤ 2 mg per package under MCA § 16‑12‑117 (2023).
• Synthetic cannabinoids (e.g. Δ8, Δ10, HHC) are prohibited under HB 948 / MCA § 16‑12‑117, effective May 22, 2023.
• Hemp cultivation and processing require Montana Department of Agriculture licensing under MCA Title 80, Ch 18 and ARM 4.19.101‑202.
• Harvest sampling, testing, and inspection required per Montana State Hemp Plan and ARM rules.

Educational content only — not legal or medical advice.

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