Invasive Plant Rules in Idaho (2026)
6 rules on the books across Idaho, 6 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
Prohibited Species
Plants that are banned or regulated in your area, including Japanese knotweed, kudzu, purple loosestrife, and other species that threaten native ecosystems.
Kootenai County
Significant RestrictionsKootenai County can designate any nonnative, non-state-listed plant as a 'county noxious weed' through its own weed…
Read full rule →Ada County
Some RestrictionsAda County makes it unlawful to knowingly keep a state-designated noxious weed on your land under Noxious Weed Control…
Read full rule →Boise
Some RestrictionsBoise's development code bars invasive, destructive, and exotic plants from every landscape plan required under City…
Read full rule →Bonneville County
Some RestrictionsBonneville County Code § 91.01 declares NOXIOUS WEEDS, as listed under Idaho Code Title 22, Chapter 24, to be offensive…
Read full rule →Caldwell
Some RestrictionsCaldwell's landscaping ordinance bans poisonous, toxic or nuisance plant material citywide and blocks specific tree…
Read full rule →Coeur Dalene
Some RestrictionsIn the City of Coeur d'Alene, Idaho, the weed abatement chapter defines a weed to include any noxious weed as defined…
Read full rule →