Horsetail

Shiney has it bob on. There are companies out there that can spray the areas to control it, but ridding of it completely is near enough impossible. I have had one near enough sucess story due to digging. I dug the life out of that border, literally about 3ft deep until it was spotless. I then continued to turn the area each day or two for a number of weeks before planting up. So far so good, but I am expecting a return.

 

That's the way I do it crush and glypho spray . That and regular picking Seems to keep it in check . Mares tail is really a living fossil , been going for over 100 million years ! So it will see most of us out , and probably the human race . Just be them and Shiney in another 100 million years

 

This is what I had to contend with some years ago. Mostly clear now but more difficult to treat when there are nearby plants you want to keep