How Much Weed Can You Have in Ohio: Limits and Federal Rules

In Ohio, adults 21 and older can legally have up to 2.5 ounces of cannabis flower and up to 15 grams of cannabis extract for personal use.¹ Those are the numbers that matter if you’re asking how much weed you can have in Ohio without breaking state law. Going over either limit puts you into the state’s drug possession penalty structure, and federal law adds a separate layer of restrictions that legal state possession does not erase.

The Two Legal Limits

Ohio splits its possession cap by product form. Plant material, meaning dried flower and similar non-concentrated cannabis, is capped at 2.5 ounces, roughly 71 grams. Everything concentrated — vape oil, edibles, tinctures, distillates — falls under a separate 15-gram cap on extract.¹

You can also give cannabis to another adult 21 or older, without payment, up to the same amounts. Advertising or publicly promoting the transfer isn’t allowed.

At licensed dispensaries, the daily purchase limits match. You can buy up to 2.5 ounces of flower per day. For non-flower products, the cap is 15,000 milligrams of THC per day.

What You Can Grow at Home

Home cultivation is legal but tightly bounded, and homegrown cannabis counts toward what you can keep on hand. One adult can grow up to six plants at their primary residence. If two or more adults 21 or older share the household, the total is capped at twelve plants no matter how many eligible adults live there.²

Plants have to sit in an enclosed, secured space that keeps anyone under 21 out and stays out of public view without binoculars or similar aid. A few other lines apply:

Growing is allowed only at your primary residence, not a second home or someone else’s property.
Hand and mechanical processing is fine; using butane, propane, or other hydrocarbon solvents to make concentrates is not.
You cannot sell homegrown cannabis or profit from it. You can give away up to six plants to another adult for free, without advertising.
A lease can prohibit cultivation outright, and that prohibition is enforceable under the statute.

You can store what you buy and what you grow at your primary residence, so long as the total stays within the 2.5-ounce and 15-gram caps.

Penalties for Going Over the Limits

Once you cross the 2.5-ounce line on flower, Ohio’s drug possession statute takes over, and the weights escalate quickly.

Flower and Plant Material

Between 2.5 ounces and 100 grams, possession is a minor misdemeanor with a maximum $150 fine. A minor misdemeanor doesn’t create a criminal record and doesn’t have to be disclosed on job or licensing applications.³

Above that, the tiers climb:

100 to 199 grams: fourth-degree misdemeanor, up to 30 days in jail and a fine of up to $250, with a possible driver’s license suspension.
200 to 999 grams: fifth-degree felony, up to 12 months in prison and a fine of up to $2,500.
1,000 to 4,999 grams: third-degree felony.
5,000 to 19,999 grams: third-degree felony with a presumption of prison.
20,000 to 39,999 grams: second-degree felony with a mandatory five-to-eight-year prison sentence.
40,000 grams or more: second-degree felony with the maximum mandatory prison term.³

A felony possession conviction can also trigger a driver’s license suspension of six months to five years.

Hashish and Extracts

Concentrates carry their own tiers, and the thresholds are lower. Possessing 10 to 49 grams of solid hashish is a fifth-degree felony. For liquid concentrates, extracts, or distillates, the fifth-degree felony range starts at 2 grams and runs to 9 grams.³ The gap between the legal 15-gram extract limit and the felony threshold for liquid concentrate is narrow. Track concentrate weight carefully.

Too Many Plants

Growing double the plant cap — more than twelve in a single-adult household or more than twenty-four in a multi-adult household — triggers a separate penalty provision under Ohio Revised Code 3780.99.² Selling plants, or gifting more than six, triggers the same provision. Going slightly over the six-plant individual cap without doubling it can still result in civil penalties set by the Division of Cannabis Control.

Where You Cannot Use What You Legally Have

Legal possession isn’t legal use everywhere. Public consumption in any form — smoked, vaped, or eaten — is prohibited, and violating that rule is a minor misdemeanor even if your amount is within the caps.⁴ Smoking or vaping cannabis in a vehicle, boat, or aircraft is illegal for drivers and passengers alike.

Driving under the influence falls under Ohio’s OVI law. The per se thresholds are 2 nanograms of THC per milliliter of blood or 10 nanograms per milliliter of urine.⁵

Even on private property, two parties can override your right to use cannabis. Landlords can prohibit use, possession, or cultivation on their property for any reason, and employers can maintain drug-free workplace policies, test employees, and act on positive results regardless of when the use happened.

Federal Rules That Still Apply

Marijuana remains a Schedule I controlled substance under federal law, and Ohio’s legalization doesn’t change that. A few areas where the conflict actually bites:

Firearms

Federal law bars anyone who uses a controlled substance from owning or buying firearms or ammunition. Using cannabis legally under Ohio law still makes you an “unlawful user” under federal definitions. ATF Form 4473 asks about controlled substance use directly, and lying on it is a separate federal crime carrying up to 10 years in prison. The U.S. Supreme Court heard oral argument in March 2026 on whether this prohibition violates the Second Amendment, but the ban remains in effect.⁶

Federal Property

National parks, military bases, federal courthouses, and post offices follow federal law. Possessing any amount of marijuana on federal property is a federal misdemeanor punishable by up to one year in jail and a minimum $1,000 fine for a first offense. Ohio has real federal acreage, including Cuyahoga Valley National Park and Wayne National Forest, where a legal state amount becomes a federal crime the moment you cross the boundary.

Crossing State Lines

Taking cannabis across a state border is a federal offense, in any form, even when both states have legalized it. Driving from Ohio into Michigan with cannabis violates federal law. Flying is the same. TSA screeners aren’t looking for marijuana specifically, but if they find it, they refer the matter to law enforcement.⁷

Federally Subsidized Housing

If you live in public housing or use a federal housing subsidy, cannabis use puts your tenancy at risk. HUD policy requires property owners in HUD programs to write lease terms allowing termination of tenancy for a household member who uses marijuana, since it’s still illegal under the Controlled Substances Act. Owners have case-by-case discretion on whether to evict, but they can’t adopt policies that affirmatively allow use on the premises.⁸

1
Ohio Legislative Service Commission. Ohio Revised Code 3780.36 – Limitations on Conduct by Individuals
2
Ohio Legislative Service Commission. Ohio Revised Code 3780.29 – Home Grow
3
Ohio Legislative Service Commission. Ohio Revised Code 2925.11 – Possession of Controlled Substances
4
Ohio Legislative Service Commission. Ohio Revised Code 3780.99 – Penalties
5
Ohio Legislative Service Commission. Ohio Revised Code 4511.19 – Operating Vehicle Under the Influence of Alcohol or Drugs – OVI
6
Legal Information Institute. United States v Ali Danial Hemani – Supreme Court Bulletin
7
Transportation Security Administration. Complete List (Alphabetical)
8
U.S. Department of Housing and Urban Development. Use of Marijuana in Multifamily Assisted Properties