knapweed has a tendency to out-compete other plants, covering a large part of the landscape Posted by Gloria on August 8, 2012 Share this: Share on Pinterest (Opens in new window) Pinterest Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Tumblr (Opens in new window) Tumblr More Email a link to a friend (Opens in new window) Email Like Loading...