US State

Cannabis and hemp laws

Iowa

Low-THC medical program only

Adult use
Illegal
Medical
Limited
Last reviewed
May 27, 2026

Iowa

Cannabinoid status board

All states and compounds

Delta-10 THC

Illegal

Limits

Delta-10 prohibited as a synthetic or semisynthetic cannabinoid under HF 2605. Consumable hemp otherwise capped at 4 mg total THC per serving and 10 mg per container.

Key law

Iowa HF 2605 (2024); Iowa Code Chapter 204 (especially §§ 204.2, 204.7, and 204.14A); Iowa Administrative Code 641 Chapter 156; enforced by Iowa Department of Health and Human Services

Effective

July 1, 2024

Full rules

Delta-8 THC

Illegal

Limits

Delta-8 prohibited as a synthetic or semisynthetic cannabinoid under HF 2605. Consumable hemp otherwise capped at 4 mg total THC per serving and 10 mg per container.

Key law

Iowa HF 2605 (2024); Iowa Code Chapter 204 (especially §§ 204.2, 204.7, and 204.14A); Iowa Administrative Code 641 Chapter 156; enforced by Iowa Department of Health and Human Services

Effective

July 1, 2024

Full rules

Delta-9 THC

Restricted

Limits

HF 2605 caps consumable hemp at 4 mg total THC per serving and 10 mg per container; age 21 minimum; warning labels and finished-product testing required. Inhalable hemp prohibited under § 204.14A.

Key law

Iowa HF 2605 (2024); Iowa Code Chapter 204 (especially §§ 204.2, 204.7, and 204.14A); Iowa Administrative Code 641 Chapter 156; enforced by Iowa Department of Health and Human Services and Department of Inspections and Appeals

Effective

July 1, 2024

Full rules

HHC

Illegal

Limits

HHC prohibited as a synthetic or semisynthetic cannabinoid under HF 2605. Consumable hemp otherwise capped at 4 mg total THC per serving and 10 mg per container.

Key law

Iowa HF 2605 (2024); Iowa Code Chapter 204 (especially §§ 204.2, 204.7, and 204.14A); Iowa Administrative Code 641 Chapter 156; enforced by Iowa Department of Health and Human Services

Effective

July 1, 2024

Full rules

THCA

Illegal

Limits

Inhalable hemp products (flower, pre-rolls, vapes) prohibited under Iowa Code § 204.14A. Consumable hemp capped at 4 mg total THC per serving and 10 mg per container.

Key law

Iowa HF 2605 (2024); Iowa Code Chapter 204 (especially §§ 204.7 and 204.14A); enforced by Iowa Department of Health and Human Services

Effective

July 1, 2024

Full rules

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Iowa

Latest news and analysis

All news

Iowa 2025: HF 2605 Goes Live—4 mg Servings, 10 mg Packages, and HHS Enforcement Guidance

Iowa HF 2605 caps consumable hemp at 4 mg total THC per serving and 10 mg per package, with HHS enforcement targeting synthetic cannabinoids in 2025.

Iowa 2025: HF 2605 Goes Live—4 mg Servings, 10 mg Packages, and HHS Enforcement Guidance

Iowa HF 2605 caps consumable hemp at 4 mg total THC per serving and 10 mg per package, with HHS enforcement targeting synthetic cannabinoids in 2025.

FAQ

Common questions

Is marijuana legal in Iowa?

Recreational marijuana is illegal in Iowa. Medical access is limited to a low-THC or CBD-only program.

Is THCA legal in Iowa?

No. Iowa Code § 204.14A makes it a serious misdemeanor to inhale a consumable hemp product, which captures THCA flower, pre-rolls, vapes, and dabs regardless of pre-decarboxylation THC content.

Is delta-8 THC legal in Iowa?

No. Iowa House File 2605 (2024) bans the manufacture, distribution, and sale of synthetic and semisynthetic cannabinoids. Commercial delta-8 is produced almost entirely through chemical conversion from hemp-derived CBD, which puts it squarely inside the prohibited category.

Is hemp-derived delta-9 THC legal in Iowa?

Restricted. Iowa House File 2605 (2024) caps hemp-derived consumables at 4 mg total THC per serving and 10 mg total THC per container, requires age-21 sales and warning labels, and bans inhalable formats outright.

This is general information, not legal advice.

Seed Legality

Iowa treats viable cannabis seed as marijuana; hemp seed is legal only when planted at an IDALS-licensed crop site.
Hemp seeds
Restricted
Marijuana seeds
Illegal
Sale
Illegal
Transacting
Illegal
Gifting
Illegal

Iowa Code § 124.101 defines marijuana as all parts of the genus Cannabis including 'the seeds thereof,' and § 124.401 criminalizes possession and distribution; Iowa has no adult-use program and its medical cannabidiol program (ch. 124E) allows no home cultivation. The Iowa Hemp Act carves hemp seed out of the marijuana definition only when it is 'delivered for planting at a licensed crop site' by a person holding an IDALS hemp license under Iowa Code ch. 204, so unlicensed possession of viable seed — even genetically hemp — risks prosecution as marijuana.

Key law:
Iowa Code §§ 124.101, 124.401; Iowa Code ch. 204 (Iowa Hemp Act)
Last reviewed:
July 3, 2026
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This section is provided for informational purposes only and is not legal advice. Seed laws change frequently — verify current law with qualified counsel before making decisions.
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