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Information
Learn about trees on the Nuisance Plants List and about where these trees are not allowed to be planted.
The plants identified on the Nuisance Plants List are prohibited from being planted within the following City zones:
- Environmental Overlay Zone
- Greenway Overlay Zone
- Pleasant Valley Natural Resources Overlay Zone.
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
| Common Name | Scientific Name |
|---|---|
| Norway maple | Acer platanoides |
| Sycamore maple | Acer pseudoplatanus |
| Horse chestnut | Aesculus hippocastanum |
| Tree-of-heaven | Ailanthus altissima |
| Cutleaf birch | Betula pendula |
| English hawthorn | Crataegus monogyna |
| English holly | Ilex aquifolium |
| Golden chain tree | Laburnum watereri |
| Empress/princess tree | Paulownia tomentosa |
| White poplar | Populus alba |
| Sweet cherry | Prunus avium |
| English laurel | Prunus laurocerasus |
| Black locust | Robinia pseudoacacia |
| European mountain ash | Sorbus aucuparia |
| Siberian elm | Ulmus pumila |