THC is legal in Kentucky in two specific forms: hemp-derived products containing no more than 0.3% Delta-9 THC by dry weight, sold to adults 21 and older, and medical cannabis obtained through the state’s licensed dispensary program by registered patients. Everything else — recreational marijuana of any amount, home cultivation, and sales outside the medical system — remains a criminal offense.
The 0.3% Rule That Decides Everything
Hemp and marijuana are the same plant, Cannabis sativa L. What separates them legally is a single number. The 2018 Farm Bill removed hemp from the federal Controlled Substances Act and defined it as cannabis with no more than 0.3% Delta-9 THC on a dry weight basis.1Food and Drug Administration. Hemp Production and the 2018 Farm Bill Anything above that line is marijuana, and marijuana is a controlled substance under both federal and Kentucky law.
The threshold is measured against total product weight, not per-serving THC. That is how a legal hemp gummy in Kentucky can contain a real dose of Delta-9 THC: the concentration across the whole product stays at or below 0.3%. It’s the reason intoxicating hemp products sit legally on shelves in a state that still prosecutes recreational marijuana.
What You Can Buy Legally as a Hemp Product
Kentucky regulates intoxicating hemp-derived products, including Delta-8 THC and similar cannabinoids, as “covered products” overseen by the Cabinet for Health and Family Services.2Kentucky Legislative Research Commission. Kentucky Acts of 2023, Chapter 78 The rules apply at the point of sale:
- You must be 21 or older to buy or possess these products.2Kentucky Legislative Research Commission. Kentucky Acts of 2023, Chapter 78
- Every covered product must pass laboratory testing for contaminants and cannabinoid content.
- Labels must show product name, cannabinoid content per serving, ingredients by weight, manufacturer information, serving size, and usage directions.
- Retailers have to keep the products behind the counter.
Non-intoxicating CBD products derived from hemp, like tinctures, oils, and topicals, sit under lighter restrictions as long as they stay within the 0.3% Delta-9 limit.
Medical Cannabis in Kentucky
Senate Bill 47, codified as KRS Chapter 218B, legalized medical cannabis in 2023.3Kentucky Legislative Research Commission. Kentucky Revised Statutes – Chapter 218B Dispensary sales began in late 2025.
To buy from a Kentucky dispensary you need to be a state resident with a written certification from a registered medical practitioner for a qualifying condition, and you cannot have a disqualifying felony. Qualifying conditions include cancer, chronic or debilitating pain, epilepsy and other seizure disorders, multiple sclerosis, chronic muscle spasms, chronic nausea, and post-traumatic stress disorder.
The registry ID card costs $25. The physician consultation is a separate cost that typically runs $100 to $250.
Smoking cannabis is not allowed under the program. Raw plant material is permitted specifically for vaporization, and edibles, oils, and tinctures are also allowed. Registered patients may keep up to a 30-day supply at home and carry up to a 10-day supply on their person.4FindLaw. Kentucky Code 218B.020 – Board of Physicians and Advisors
What Still Gets You Charged
Outside the medical program, marijuana is illegal, and even small amounts carry criminal exposure.
Possession
Possessing any amount of marijuana without medical authorization is a Class B misdemeanor. The statute caps incarceration at 45 days, lower than the standard 90-day maximum for that class.5Justia Law. Kentucky Code 218A-1422 – Possession of Marijuana – Penalty – Maximum Term of Incarceration The fine can reach $250.
Cultivation
Growing fewer than five plants is a Class A misdemeanor on a first offense, punishable by up to 12 months in jail and a fine up to $500. A second offense at that scale becomes a Class D felony.6Justia Law. Kentucky Code 218A-1423 – Marijuana Cultivation – Penalties Growing five or more plants is a Class D felony on the first offense and a Class C felony after that.
Trafficking
Selling or transferring marijuana carries penalties tied to quantity:7Kentucky Legislative Research Commission. Kentucky Revised Statutes 218A.1421 – Trafficking in Marijuana – Penalties
- Less than 8 ounces: Class A misdemeanor first offense, Class D felony second.
- 8 ounces to under 5 pounds: Class D felony first, Class C felony second.
- 5 pounds or more: Class C felony first, Class B felony second.
Possessing 8 or more ounces creates a legal presumption that you intended to sell, even without evidence of a transaction.7Kentucky Legislative Research Commission. Kentucky Revised Statutes 218A.1421 – Trafficking in Marijuana – Penalties
Guns and a Medical Cannabis Card Don’t Mix
Federal law prohibits any “unlawful user of or addicted to any controlled substance” from possessing a firearm, with penalties up to 15 years in prison.8Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Marijuana remains Schedule I federally, so the prohibition applies to Kentucky medical cannabis patients who are fully compliant with state law.
ATF Form 4473, which you fill out to buy a firearm, asks directly whether you are an unlawful user of a controlled substance. Answering dishonestly is a separate federal crime. Holding a medical card and buying a gun creates a documented conflict on paper.
The U.S. Supreme Court heard arguments in March 2026 in a case challenging this prohibition under the Second Amendment. As of mid-2026 the restriction is still in force.
Crossing State Lines
Taking marijuana across a state border is federal trafficking under the Controlled Substances Act, regardless of what either state allows. A Kentucky medical card gives you no protection driving into another legal state, and airports are federal jurisdiction, so flying with marijuana is likewise illegal.
Hemp-derived products that meet the 0.3% Delta-9 limit are legal to transport under the 2018 Farm Bill, but enforcement varies. Officers in another state may not distinguish legal hemp from marijuana on sight, and some states regulate hemp-derived THC more strictly than Kentucky does.
Your Job Is Not Protected
Kentucky gives medical cannabis patients no employment protection. An employer can drug test you and terminate you for a positive THC result, even with a valid card and use only during off-duty hours.
The Americans with Disabilities Act does not require employers to accommodate medical marijuana use. Because marijuana is still Schedule I, courts have consistently dismissed failure-to-accommodate claims from medical cannabis patients. Safety-sensitive roles and federal contractor positions carry even tighter testing requirements with no realistic path to accommodation.