US State

Cannabis and hemp laws

Connecticut

Recreational and medical marijuana legal; THCA and hemp delta-9 restricted; delta-8, delta-10 and HHC illegal

Adult use
Legal
Medical
Legal
Last reviewed
May 27, 2026

Connecticut

Cannabinoid status board

All states and compounds

Delta-10 THC

Illegal

Limits

CGS §21a-240 defines THC to include delta-10. PA 23-79 §1(63) classifies hemp manufacturer products above 1 mg per serving or 5 mg per container of total THC (edibles, topicals, transdermals), 1 mg per serving or 25 mg per container (tinctures), or 25 mg per container (concentrates/extracts) as high-THC hemp products that may only be sold by licensed cannabis retailers.

Key law

Public Act 23-79 (HB 6699, 2023); PA 24-76 (HB 5150, 2024); CGS Chapter 420h; CGS §21a-240

Effective

July 1, 2023

Full rules

Delta-8 THC

Illegal

Limits

Delta-8 THC is captured by Connecticut's THC definition at CGS §21a-240. Synthetic and chemically converted delta-8 falls within the high-THC hemp product framework when it exceeds 1 mg per serving or 5 mg per container and may only be sold by licensed cannabis retailers, hybrid retailers, or dispensary facilities.

Key law

Public Act 23-79 (HB 6699, 2023); PA 24-76 (HB 5150, 2024); CGS Chapter 420h; CGS §21a-240

Effective

July 1, 2023

Full rules

Delta-9 THC

Restricted

Limits

Under PA 23-79 §1(63), hemp edibles, topicals, and transdermals are high-THC at >1 mg per serving or >5 mg per container of total THC; tinctures at >1 mg per serving or >25 mg per container; concentrates/extracts at >25 mg per container. PA 24-76 added a moderate-THC tier (0.5–5 mg total THC per container) requiring a DCP certificate of registration effective January 1, 2025.

Key law

Public Act 23-79 (HB 6699, 2023); PA 24-76 (HB 5150, 2024); CGS Chapter 420h; CGS §21a-240

Effective

July 1, 2023

Full rules

HHC

Illegal

Limits

CGS §21a-240's synthetic cannabinoid definition expressly names hexahydrocannabinol (HHC, HXC) and similar chemically converted products and treats them as controlled substances. HHC products may only be sold through DCP-licensed cannabis retailers, hybrid retailers, or dispensary facilities.

Key law

Public Act 23-79 (HB 6699, 2023); PA 24-76 (HB 5150, 2024); CGS Chapter 420h; CGS §21a-240 (synthetic cannabinoid)

Effective

July 1, 2023

Full rules

THCA

Restricted

Limits

Hemp flower or trim above 0.3% total THC by dry weight is a high-THC hemp product and may only be sold by licensed cannabis retailers, hybrid retailers and dispensary facilities. Per PA 23-79 §1(63), high-THC hemp manufacturer products use mg-based caps; flower/trim is keyed off the 0.3% dry-weight threshold.

Key law

Public Act 23-79 (HB 6699, 2023); PA 24-76 (HB 5150, 2024); CGS Chapter 420h (RERACA); CGS §21a-240(63)

Effective

July 1, 2023

Full rules

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Connecticut

Latest news and analysis

All news

Connecticut's 173-Page Cannabis Code Rewrite: New Licenses, THC Limits, and Infused Beverage Rules

Connecticut introduced a 173-page bill in February 2026 rewriting marijuana and hemp licensing, THC limits, and infused beverage rules in the state code.

Connecticut’s 2025 Overhaul: “Naturally Manufactured” Hemp Cannabinoids, Low‑THC Carve‑Outs, and Who Can Sell What

Connecticut SB 970 redefines naturally manufactured hemp cannabinoids and low-THC products in 2025, resetting who can sell what across retail channels.

Connecticut’s New THC Thresholds: Impact on Local Hemp Farmers

Connecticut's hemp rules effective October 1, 2025 cap manufactured hemp products at 1 milligram THC per serving, among the strictest state thresholds.

Connecticut's 173-Page Cannabis Code Rewrite: New Licenses, THC Limits, and Infused Beverage Rules

Connecticut introduced a 173-page bill in February 2026 rewriting marijuana and hemp licensing, THC limits, and infused beverage rules in the state code.

Connecticut’s 2025 Overhaul: “Naturally Manufactured” Hemp Cannabinoids, Low‑THC Carve‑Outs, and Who Can Sell What

Connecticut SB 970 redefines naturally manufactured hemp cannabinoids and low-THC products in 2025, resetting who can sell what across retail channels.

Connecticut’s New THC Thresholds: Impact on Local Hemp Farmers

Connecticut's hemp rules effective October 1, 2025 cap manufactured hemp products at 1 milligram THC per serving, among the strictest state thresholds.

FAQ

Common questions

Is marijuana legal in Connecticut?

Recreational marijuana is legal in Connecticut. Medical marijuana is legal.

Is THCA legal in Connecticut?

Restricted. THCA flower and trim above 0.3% total THC by dry weight is a high-THC hemp product under Public Act 23-79 (HB 6699, 2023) and may only be sold by licensed cannabis retailers, hybrid retailers, and dispensary facilities regulated by the Department of Consumer Protection.

Is delta-8 THC legal in Connecticut?

Restricted. Connecticut’s THC definition at CGS §21a-240 expressly includes delta-8-tetrahydrocannabinol.

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

Restricted. Hemp-derived delta-9 products above the mg thresholds in Public Act 23-79 §1(63) are high-THC hemp products and may only be sold by DCP-licensed cannabis retailers, hybrid retailers, or dispensary facilities.

This is general information, not legal advice.

Seed Legality

CT adults may possess seeds and grow 6 plants; retail seed channels are narrow and sale-linked gifting is banned.
Hemp seeds
Legal
Marijuana seeds
Legal
Sale
Restricted
Transacting
Legal
Gifting
Legal

Since July 1, 2023, all Connecticut adults 21+ may grow up to three mature and three immature plants at home (twelve per household) under RERACA, Conn. Gen. Stat. § 21a-420 et seq., making seed possession and genuine adult-to-adult gifts lawful. Commercial access is narrower: DCP guidance provides that as of July 1, 2024 only licensed micro-cultivators may sell seedlings directly to consumers by delivery, and Public Act 22-103 outlaws 'gifting' tied to any purchase, donation, or admission fee (the cannabis-bazaar ban). Hemp cultivation requires a Department of Agriculture license under Conn. Gen. Stat. § 22-61l, though hemp seed itself is not contraband.

Key law:
Conn. Gen. Stat. § 21a-420 et seq. (P.A. 21-1, RERACA); P.A. 22-103; § 22-61l
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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