Quote Originally Posted by CathyA View Post
Unfortunately, there's lots of exotic invasives still being sold in the U.S.
Quite true, though some nurseries will not sell non-native "noxious" plants (ie it's illegal to put in a Russian olive tree in CO b/c they are considered noxious). However, sometimes even the native things are a problem if in the wrong area. The renters didn't keep up our yard too well, so now we have a mini aspen forest in what used to be the garden! The next door neighbors have a stand of aspens and the trees reproduce with underground rhizomes or runners even many feet away, and you cannot pull them since they are connected to the strong underground root. So it's constant cutting, sigh. Aspens are indeed native to the Rocky Mountains so no banning them! But they are annoying if you don't want them in your yard, but your neighbors do.