Invasive Plant Rules in Oregon (2026)
16 rules on the books across Oregon, 14 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
Bamboo Restrictions
Rules about planting running bamboo near property lines, containment requirements, removal obligations, and fines for bamboo that spreads to neighboring properties.
Prohibited Species
Plants that are banned or regulated in your area, including Japanese knotweed, kudzu, purple loosestrife, and other species that threaten native ecosystems.
Gresham
Heavy RestrictionsGresham bans selling, planting, releasing, or spreading any plant on the city's official Invasive Plant List, which the…
Read full rule →Portland
Heavy RestrictionsPortland property owners must eradicate every species on the City's Nuisance Plants List, roots, shoots, and seeds…
Read full rule →Beaverton
Significant RestrictionsWithin Beaverton's Cooper Mountain Resource Overlay, planting vegetation on the city's approved nuisance or prohibited…
Read full rule →Tigard
Significant RestrictionsIn the City of Tigard, Oregon, no responsible party can plant or allow to be planted on their property five named…
Read full rule →Bend
Some RestrictionsThe City of Bend bars any property owner from allowing noxious vegetation to grow on land they own within City limits…
Read full rule →Benton County
Some RestrictionsBenton County bans removing vegetation from riparian areas and Systems-Critical Wetlands under BCC 88.320(1), but…
Read full rule →Eugene
Some RestrictionsWithin the S-DR/CL Cultural Landscape and Open Space subdistrict of Eugene's Downtown Riverfront Special Area Zone, EC…
Read full rule →Hillsboro
Some RestrictionsHillsboro's Community Development Code bars nuisance plants, defined as species that are both invasive and non-native…
Read full rule →Multnomah County
Some RestrictionsUnincorporated Multnomah County's SEC-h wildlife-habitat overlay bans planting nuisance and invasive nonnative plants…
Read full rule →Springfield
Some RestrictionsIn the City of Springfield, Oregon, subdivision approvals may require removal of species on the City's Invasive Plants…
Read full rule →Washington County
Some RestrictionsWhen a development in unincorporated Washington County must install landscaping, the Community Development Code bars…
Read full rule →Tree-of-Heaven Removal
Rules requiring removal of Ailanthus altissima (tree-of-heaven), the invasive species that hosts spotted lanternfly, including state programs and city-level mandates.
Portland
Heavy RestrictionsPortland requires property owners to eradicate tree-of-heaven and every other species on the City's Nuisance Plants…
Read full rule →Medford
Significant RestrictionsMedford outlaws planting ailanthus, the invasive tree-of-heaven, on any public property citywide. The same section bans…
Read full rule →Beaverton
Few RestrictionsBeaverton's Development Code exempts Tree-of-Heaven (Ailanthus altissima) from Tree Plan permit requirements when…
Read full rule →Salem
Few RestrictionsSalem's tree code names Tree of heaven (Ailanthus altissima) as one of four species specifically excluded from…
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