Cut and bag, and incinerate knotweed new growth unless stem filling late
Herbicide treatments: stem filling, glove wiping, and foliar spray
Sept. - October
Cut, bag and incinerate dead stalks
Annual Schedule: Cut Only Areas
Document current infestation
Mid-June to early July
Cut and bag knotweed new growth
Three or more additional treatments of cutting and bagging new growth
Scan the area up to 60 feet away for new stems.
Cut knotweed stems individually to desired height, but less than 6". Note: Using a mechanical mower will probably spread the infestation since every knotweed fragment can start another plant if left on the ground.