Impacts to City Services

Find information about city services during this Emergency Declaration for Work Stoppage

Nuisance Tree List

The plants identified on the Nuisance Plants List are prohibited from being planted within the Environmental Overlay Zone, Greenway Overlay Zone, and the Pleasant Valley Natural Resources Overlay Zone.

Click here to find your zoning. In addition, species on the Nuisance Plant List cannot be planted as street trees or be installed in City required landscaping areas. For detailed information on the Nuisance Plants list, see Section 4 of the Portland Plant List.

Trees on the Nuisance Plants List

Tree species identified as nuisance plants on the Portland Plant List.
Common NameScientific Name
Norway MapleAcer platanoides  
Sycamore MapleAcer pseudoplatanus
Horse ChestnutAesculus hippocastanum
Tree-of-heavenAilanthus altissima
Cutleaf BirchBetula pendula
English HawthornCrataegus monogyna
English HollyIlex aquifolium
Golden Chain treeLaburnum watereri
Empress/princess treePaulownia tomentosa
White PoplarPopulus alba
Sweet CherryPrunus avium
English LaurelPrunus laurocerasus
Black LocustRobinia pseudoacacia
European Mountain AshSorbus aucuparia
Siberian ElmUlmus pumila