Idaho Falls, ID Landscaping Rules: Weed Ordinances (2026)

Weed control in Idaho Falls operates on two levels. Locally, City Code Title 5, Chapter 8 (Litter and Weed Control) makes it unlawful and a public nuisance to allow weeds or noxious weeds to grow, exist, or accumulate on real property (5-8-11). The code defines a 'noxious weed' by reference to the Idaho Department of Agriculture's list in IDAPA 02.06.22 and states that every plant identified as a noxious weed 'is prohibited within City limits.' General weeds (non-noxious) become a nuisance when they exceed ten inches in height and the height results from neglect rather than intentional ornamental, agricultural, or native/xeriscape planting. Enforcement uses the notice-to-abate, appeal, and City-abatement procedure in 5-8-12 through 5-8-14, with abatement costs assessed against the property. Statewide, Idaho Code 22-2407 imposes an independent duty: 'It shall be the duty and responsibility of all landowners to control noxious weeds on their land and property,' and 'the cost of controlling noxious weeds shall be the obligation of the landowner.' County weed-control authorities can serve individual notices and bill landowners for work done after a five-day notice. So even where the City rule might not reach a particular parcel, the state noxious-weed duty still applies.