Delta-9 THC is legal in different ways in different places. Hemp-derived delta-9 products containing no more than 0.3% THC by dry weight are federally legal in all 50 states under the 2018 Farm Bill, and 24 states plus Washington, D.C. have gone further by legalizing marijuana-derived delta-9 for adult recreational use. But the states where delta-9 THC is legal are not a simple list: roughly a dozen states have pulled intoxicating hemp products off general retail shelves and routed them into their licensed cannabis systems, a handful cap milligrams per serving or package, and a few prohibit it almost entirely. A federal law signed in 2025 will also sharply tighten the hemp side of this market starting November 12, 2026.
Why the Same Molecule Has Two Legal Statuses
Federal law splits cannabis into two categories based on concentration. Hemp is defined as Cannabis sativa L. and its derivatives containing no more than 0.3% delta-9 THC on a dry weight basis.1Office of the Law Revision Counsel. 7 U.S. Code 1639o – Definitions Anything above that threshold is marijuana, a Schedule I controlled substance.2Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances The 2018 Farm Bill removed hemp from the Controlled Substances Act, making it legal to grow, process, and sell hemp-derived products nationwide if they stay at or below that 0.3% ceiling.3U.S. Food and Drug Administration. Hemp Production and the 2018 Farm Bill
Here is the quirk that built the current market. The 0.3% limit is measured against the product’s total dry weight, not the dose. A gummy or beverage that weighs enough can carry a meaningful amount of delta-9 THC and still stay under 0.3%. A drink with 5 milligrams of delta-9 only needs about 1.67 grams of dissolved solids to meet the standard. That math is why intoxicating hemp-derived delta-9 products ended up in gas stations, smoke shops, and online stores across the country, even in states that never passed a recreational marijuana law.
States Where Recreational Marijuana Is Legal
In these 24 states and Washington, D.C., adults 21 and older can buy delta-9 THC products from state-licensed dispensaries at potencies far above the 0.3% hemp threshold:
- Alaska
- Arizona
- California
- Colorado
- Connecticut
- Delaware
- Illinois
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Missouri
- Montana
- Nevada
- New Jersey
- New Mexico
- New York
- Ohio
- Oregon
- Rhode Island
- Vermont
- Virginia
- Washington
- Washington, D.C.
Legalization dates run from 2012 (Colorado and Washington) through recent years. Details differ: purchase and possession caps vary, not every state allows home growing, and legalization on paper does not always mean open retail. Virginia, for example, legalized possession and home cultivation but has been slow to launch licensed retail sales. Many additional states run medical programs allowing patients with qualifying conditions to buy higher-potency delta-9 products through dispensaries.
States That Pulled Hemp Delta-9 Off General Shelves
This is where “federally legal” stops meaning “legal where you are.” Several states, including some on the recreational list above, have moved intoxicating hemp-derived delta-9 out of convenience stores and vape shops and into their licensed cannabis systems, or banned it outright. The policy goal is to funnel all intoxicating THC products through tested, taxed, age-restricted channels.
As of late 2025, these states have restricted intoxicating hemp-derived delta-9 from general retail:
- California, under emergency regulations that bar any detectable THC in hemp food, beverage, and dietary products, prohibit sales to anyone under 21, and limit packages to five servings.4California Department of Public Health. California’s Ban on Intoxicating Hemp Products Now in Effect
- Colorado, which prohibits chemically converted THC cannabinoids (such as CBD converted to delta-8) outside the regulated cannabis market.
- Connecticut, which treats hemp products with meaningful THC content or synthetic cannabinoids as cannabis products that only licensed retailers can sell.
- Delaware, which does not exempt hemp-derived THC from its controlled substances framework.
- Maryland, which prohibits hemp-derived THC sales outside licensed cannabis stores.
- Massachusetts, which bans most intoxicating hemp-derived cannabinoids from general retail.
- Michigan, which classifies all intoxicating THC compounds as marijuana regardless of botanical origin.
- Nevada, which requires intoxicating THC products to be sold only through licensed dispensaries.
- New Jersey, which routes hemp-derived THC products through the cannabis dispensary system.
- Oregon, which prohibits hemp-derived THC products outside its regulated cannabis system.
Alaska and Arizona have taken similar steps, keeping most intoxicating hemp products out of conventional retail. The practical effect across all of these states is the same. You can legally buy delta-9 THC, but only through a licensed dispensary, not through an online hemp retailer or a corner store.
States With Milligram Caps on Hemp Delta-9
Some states allow hemp-derived delta-9 in general retail but limit potency. Caps vary and shift from session to session:
- Iowa caps hemp products at 4 milligrams of THC per serving and 10 milligrams per container.5Iowa Public Radio. Confused About Iowa’s New Hemp Law? Here’s What We Know
- Minnesota originally set limits at 5 milligrams per serving and 50 milligrams per package for hemp-derived THC edibles, with 2025 legislation proposing higher caps for adult-use cannabis products.
- New York limits total milligrams of THC per serving and per package in certain hemp products and restricts sales of smokable and vapeable hemp products to buyers 21 and older.6Office of Cannabis Management. Cannabinoid Hemp Consumers
States Where Delta-9 THC Is Heavily Restricted
A few states keep delta-9 THC largely off-limits regardless of source. Idaho has historically been the most restrictive, banning marijuana in all forms with no medical or recreational exceptions. Kansas has taken a similar line, though a 2025 bill (SB 292) proposed a regulated framework for hemp-derived cannabinoids with an age-21 requirement and potency caps; that bill was still in committee as of late 2025.
South Dakota caps hemp-derived products at 0.4 milligrams of combined THC per container and bans chemically converted cannabinoids like delta-8 and delta-10.7South Dakota Legislature. 2026 Senate Bill 61 Georgia limits consumable hemp products to a total delta-9 THC concentration not exceeding 0.3% on a dry weight basis, essentially tracking the federal standard rather than allowing the larger-package workarounds other states permitted.8Georgia General Assembly. Senate Bill 33 – Relating to Hemp Farming Act and Consumable Hemp Products
The November 2026 Federal Change
Section 781 of the Continuing Appropriations and Extensions Act of 2026 rewrites the federal hemp framework. The new rules take effect November 12, 2026, and will substantially shrink the hemp-derived delta-9 market as it currently exists:
- The legal definition of hemp will be based on total THC, including delta-9, THCA, and any other cannabinoid the Secretary of Health and Human Services designates as having similar intoxicating effects.
- Finished hemp products intended for human or animal consumption through ingestion, inhalation, or topical use will be limited to 0.4 milligrams of total THC per container, a small fraction of what a typical gummy contains today.
- Intermediate hemp products (bulk extracts and ingredients) must stay at or below 0.3% total THC on a dry weight basis after decarboxylation.
- Any cannabinoid not naturally produced by the Cannabis sativa plant, or synthesized outside the plant, will be regulated as a controlled substance and can no longer be sold as hemp.
Once this takes effect, hemp-derived delta-9 edibles and drinks currently sold outside licensed cannabis dispensaries will need to be reformulated to near-zero THC or pulled from shelves. A House bill would repeal Section 781, but as of early 2026 it had not advanced. If you currently rely on hemp-derived delta-9 products in a state without a recreational marijuana market, this change directly affects your access.
What Marijuana Rescheduling Would and Would Not Do
In late 2025, the Trump administration signed an executive order directing the Attorney General to complete the rescheduling of marijuana from Schedule I to Schedule III under the Controlled Substances Act.9U.S. Department of Transportation. DOT’s Notice on Testing for Marijuana That process remained underway in early 2026. Rescheduling would not legalize recreational marijuana federally. Schedule III substances like testosterone and ketamine are still controlled, still require prescriptions, and are still illegal to possess without authorization. Rescheduling would ease research restrictions, reduce certain federal penalties, and change how cannabis businesses interact with the tax code and banking system. Until it is finalized, marijuana remains Schedule I.
Traveling and Shipping Across State Lines
Legality does not travel with the product. TSA policy allows hemp-derived products containing no more than 0.3% THC on a dry weight basis in carry-on and checked bags on domestic flights.10Transportation Security Administration. Medical Marijuana TSA officers are not actively searching for cannabis, but if they encounter a product that appears to violate federal law they will refer the matter to law enforcement. More importantly, the state you land in may treat the same product very differently than the state you left. A hemp gummy legal in Texas may be illegal in Idaho.
Federal property is its own jurisdiction regardless of the state surrounding it. Possessing marijuana on federal land, including national parks, military installations, and federal buildings, is a federal offense. A first offense for any amount is a misdemeanor carrying up to one year of incarceration and a fine of up to $1,000; second offenses carry a mandatory minimum of 15 days and fines up to $2,500.
USPS allows domestic shipping of hemp-derived products at or below the 0.3% THC threshold, but shippers must comply with all applicable federal, state, and local laws and retain compliance records including lab test results for at least two years.11USPS. Domestic Shipping Prohibitions, Restrictions, and HAZMAT Shipping hemp to international or military destinations is prohibited.
Because state rules shift frequently and the federal floor is changing in November 2026, checking your current state’s law before buying, carrying, or shipping any delta-9 THC product is the step that separates a legal purchase from a criminal charge.