COLUMBUS — Ohio law allows adults to grow marijuana at home, but legislation heading to Gov. Mike DeWine would tighten where and how residents can legally cultivate cannabis, further reshaping the state’s newly legalized adult-use market.

Under current Ohio law, adults may grow marijuana plants at their primary residence, but strict limits already apply. Households with one or more adults age 21 or older may grow no more than 12 plants total, regardless of how many adults live in the home. Earlier this year, lawmakers dropped proposals that would have cut the plant limit further.

Ohio law already imposes steep penalties for violations. Anyone who grows 24 plants or more — double the legal limit — or sells or advertises cannabis plants can face drug trafficking charges, according to state

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