Ironweed (should I spray it)
I thought I had killed everything in my first-year field before broadcasting my native grass and forbs seeds; however, there are hundreds of ironweeds growing very tall in the field. I sprayed most of them with RoundUp, but it didn't kill them, and it's been two weeks. I did not choose to have ironweed in my 33 forbs, and I am wondering if I should just let them grow and accept them as part of the other forbs. More and more are starting to show. See: http://personal.myvine.com/~joebryant/meadow.htm for a list of my forbs in little bluestem grass. Everything else is about eight-inches tall now, but the ironweed is about two feet.
Here is a link that might be useful: Joe Bryant's Wildflower meadow