Iowa Weed Ordinances Law: Statewide Landscaping Rules Rules (2026)

Iowa Noxious Weed Law Statewide Requirements

Some RestrictionsApplies statewide across Iowa (2026)

Iowa Code Chapter 317 establishes statewide noxious weed control. Landowners must cut, destroy, or otherwise control state-listed noxious weeds on their property. County weed commissioners enforce the law and may assess control costs to delinquent landowners as a property tax lien.

Key Facts

Statute: Iowa Code Chapter 317
Enforcement: County weed commissioner
Notice period: Five days minimum
Cost recovery: Property tax assessment
Scope: Statewide application

Full Breakdown

Chapter 317 designates primary noxious weeds (such as field bindweed, Canada thistle, leafy spurge, and perennial sow thistle) and secondary noxious weeds (including wild mustard, cocklebur, buckhorn, and quackgrass) that all Iowa landowners must control. County boards of supervisors appoint weed commissioners who issue notices, and if landowners fail to act within five days, the county may perform the work and bill the landowner. The Iowa Department of Transportation handles state highway rights-of-way. Counties may declare additional plants noxious within their borders, but the underlying duty to control state-listed weeds applies uniformly across Iowa.

Violations & Penalties

Failure to control noxious weeds after notice from the weed commissioner allows the county to enter the property, cut the weeds, and assess all costs plus administrative fees against the landowner.

Frequently Asked Questions

Which weeds are considered noxious in Iowa?

Iowa Code 317.1A lists primary noxious weeds like Canada thistle, field bindweed, leafy spurge, and perennial sow thistle, plus secondary species such as wild mustard, cocklebur, and quackgrass.

What happens if I ignore a weed notice from the county?

After five days, the weed commissioner may enter your property to destroy the weeds and bill you for labor and equipment. Unpaid costs become a special assessment on your property taxes.

Can a county add weeds beyond the state list?

Yes. Counties may declare additional plants noxious within their boundaries, but they cannot lower the standards established by Iowa Code Chapter 317 for state-listed weeds.