Auburn, WA Invasive Plant Rules: Tree-of-Heaven Removal (2026)

040, part of the street tree ordinance adopted under the city's 1957 code and continued today, provides: it is unlawful to plant in any public parking strip the following trees: poplar, willow, cottonwood, fruit trees (except ornamental types), nut trees, ailanthus, mountain ash and Oregon or big-leaf maple, or any other tree the roots of which cause injury to the sewers, sidewalks or pavements, or which breed disease dangerous to other trees or to the public health. Ailanthus is the scientific-genus name for tree of heaven, an aggressive invasive species regulated here through the parking-strip planting ban rather than through a separate noxious-weed chapter.

050 that the abutting owner must trim or remove. 080 authorizes the city engineer to abate the nuisance directly and lien the abatement cost, including the engineer's own expenses, against the property. 110 makes clear these remedies are cumulative, not exclusive, so the city can pursue abatement and a civil penalty at the same time.