Ohio Rev. Code Ann. § 2925.04
(C)
(3) If the drug involved in the violation of division (A) of this section is methamphetamine, the penalty for the violation shall be determined as follows:
(5) If the drug involved in the violation is marihuana, the penalty for the offense shall be determined as follows:
(D) In addition to any prison term authorized or required by division (C) or (E) of this section and sections 2929.13 and 2929.14 of the Revised Code and in addition to any other sanction imposed for the offense under this section or sections 2929.11 to 2929.18 of the Revised Code, the court that sentences an offender who is convicted of or pleads guilty to a violation of division (A) of this section shall do all of the following that are applicable regarding the offender: