I am hoping that someone can help with our home gardening nightmare. We installed new landscape a few years ago. A designer from a local nursery recommended giant horsetail for one area of my yard. She swore up and down that the expensive chemical Bio Barrier would keep the giant horsetail from spreading into the rest of my yard. WRONG! It’s everywhere. I was just too naive at the time to question her.
I can’t keep the giant horsetail under control. I’ve tried RoundUp, digging it up, Remuda, Brush B Gon and a few other garden chemicals that don’t work. I’ve read about liming but the San Diego City Weed Expert (I can’t remember his real title) said there is already a lot of lime in our water and that I shouldn’t do that. His answer was to cut off the top of each new horsetail stalk, and shoot a syringe full of Brush B Gon down the center of it. Well, I’d be out there every day for multiple hours if I followed his advice. I did try it, but with no success. I don’t want to handle poison like that.
Any ideas? If you had or have horsetail in your hard, how do you control or eradicate it?