Due to the plant’s aggressive nature, the best option is to get a professional removal company, experienced in dealing with invasive species to remove the Horsetail. They will first assess the size of the problem and provide you with a plan going forward. This can depend not just on the size of the infestation but on its location. If it’s a domestic garden, for example, full excavation might not be possible to remove all the rhizomes deep in the ground because of pipework and other infrastructure. In this case, the team might suggest partial excavation in order to remove as much as possible followed by specialist herbicides to kill off the remaining Horsetail rhizomes. In areas like construction sites and wasteland, Horsetail infestations can take over large areas very quickly and the only viable option is to dig out the ground and remove it completely using heavy machinery.