Our focus is residential, herbicide treatment which is generally the most appropriate and cost effective treatment method for residential properties. This approach uses the application of herbicide to the Knotweed at the most appropriate times during the growing season. We use glyphosate in most cases and apply at regular intervals during the growing season, usually over a 3-5 year period. We can apply the chemical by spray, injection or leaf wiping. Injection and leaf wiping are particularly useful when there is water or other plant and tree species nearby that we want to preserve.