This method can prove very economical, but this method requires large areas of space to be allocated for the stockpile so is not suited to many development sites. The treated stockpile material should remain on site, unless it is consigned off site as potentially knotweed infested. The thickness of the stockpile can be increased to reduce the space requirement, but this will extend the treatment period using herbicides to more than two growing seasons. So it may be that other methods, such as Xtract, are better suited. If you would like a quote for knotweed removal with an insurance backed guarantee underwritten by an “AA-” rated insurer then please give us a call today.