May 29, 2009Scotch broom is noxious in Pacific Northwest
Nov 19, 2007Be on the lookout for prickly Paterson's Curse in wildflower seed mixes.
Jun 20, 2008Gorgeous yellow iris Is ecological threat to PNW wetlands
Mar 2, 2007Oregon is the first state to list invasive non-native grass called false brome as a noxious weed.
Jan 21, 2005Butterfly bush, or Buddleia, can be a very aggressive non-native plant that, in certain situations, can overtake native vegetation. Take care to cut blossoms off in the fall.