Japanese Knotweed is without exception Ireland’s No. 1 high impact invasive plant species. It is easily spread and can be challenging to completely eradicate. Knotweed Control Ireland specialize in all current best practice eradication and control methods working nationally providing our clients with advanced site-specific solutions. We were the first Irish company to offer clients the full range of eradication and control methods. We opened for business in early 2015.