Growing cannabis at home is illegal in Johnson County. Iowa has no recreational or plant-form medical marijuana, only a narrow low-THC medical cannabidiol program. Cultivating cannabis plants is a criminal offense under state law.
Iowa does not allow home cannabis cultivation for any purpose. The state's only lawful program is the Medical Cannabidiol Act, Iowa Code chapter 124E, which lets registered patients buy limited, low-THC cannabidiol products from a few state-licensed dispensaries. It does not permit smokable marijuana, edibles, or growing plants. Cultivating cannabis is treated as manufacture of a controlled substance and is criminal under Iowa Code section 124.401, and possession of marijuana is a criminal offense there as well. Iowa City has historically treated minor marijuana enforcement as a low priority, but state law still applies and the Johnson County Attorney and sheriff enforce it.
Growing cannabis plants can be charged as manufacture of a controlled substance under Iowa Code section 124.401, a felony-level offense depending on quantity, with plants seized and possible imprisonment and fines.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Johnson County, IA
No county or state law limits holiday lights, inflatables, or yard displays. Iowa City, Coralville, and North Liberty rarely regulate seasonal decorations, a...
Johnson County, IA
No countywide rule governs garage-sale signs; each city sets its own. A temporary sign on your own lawn is generally fine, but one staked in a public right-o...
Johnson County, IA
Cities and the county regulate signs through zoning codes, not a countywide rule. Since Reed v. Town of Gilbert (2015), those codes must stay content-neutral...
Johnson County, IA
Rental permits are a city job, not a county one. Iowa City runs a mandatory rental-permit program with a two-year inspection cycle through its Housing Inspec...
Johnson County, IA
Iowa is landlord-friendly and has no just-cause eviction law, so no Johnson County city can add one. But the security deposit is capped at two months' rent u...
Johnson County, IA
Iowa has no rent control, and no government in Johnson County can create one. Iowa City, Coralville, and North Liberty landlords set and raise rent at market...
See how Johnson County's home cultivation rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.