Tree of Heaven, Ailanthus altissima


  • Fast-growing and a prolific seeder that can take over quickly
  • Replaces native plants and forms dense thickets
  • Produces chemicals that prevent the establishment of other plant species
  • Its root system may be extensive and has been known to cause damage to sewers and foundations

Other problematic invasive weeds:

Giant Reed (Arundo donax)

Salt Cedar (Tamarisk ramosissima)

Perennial Pepperweed (Lepidium latifolium)

Yellow Starthistle (Centaurea solstitialis)

Barbed Goat Grass (Aegilops triuncialis)

Purple Starthistle (Centaurea calcitrapa)