Eugene, OR Invasive Plant Rules: Prohibited Species (2026)

Eugene's land use code separates its Downtown Riverfront Special Area Zone (S-DR) into a Mixed-Use subdistrict and a Cultural Landscape and Open Space subdistrict (S-DR/CL), the latter covering riverfront parks, riparian corridors and open space along the Willamette. " The same subsection layers on affirmative native-planting quotas rather than leaving compliance to a single ban. In areas mapped as riverfront park, at least 50 percent of trees, 40 percent of shrubs, 30 percent of grasses and 30 percent of groundcover must come from the city's Goal 5 Native and Non-native Plant List, adopted as Exhibit F to Ordinance No.

20351. In riparian enhancement areas, every plant installed must be native. Within 25 feet of the Willamette River's ordinary high water line, any planting or replacement planting must use native trees or large shrubs, and where non-native or damaged trees are removed in that same 25-foot band they must be replaced with native tree or large shrub species. 3185(3)(a)3 requires it be completed within 90 days of removal unless the planning director approves otherwise, and seeded areas must be timed so germination occurs before November 15.

3185(3)(a)5 backs up the invasive-species ban with a broader standard: plantings may not adversely affect adjacent protected water resources or existing native vegetation through shading or invasion by plant species. 3190, but that review still has to demonstrate habitat and ecological quality equivalent to strict compliance. The Eugene Code is current through Ordinance No. 20739, passed June 8, 2026.