Rick you have horsetail too? Last year was my first experience with it. Never had it at any of my other houses. I just kept plucking it, I went out EVERYDAY spring and early summer plucking any I saw. By fall I didn't see so much of it coming up. That is in my flower beds. Its all in the lawn. Sadly I had to accept it will be with me forever. At least I came to realize there are worse weeds.