How do you eradicate Japanese Knotweed (Mexican Bamboo)?
The Plant Conservation Alliance (PCA) gives several methods of eliminating Japanese knotweed (Polygonum cuspidatum), including: * removing the entire plant, including all roots and runners, and disposing of it in a dumpster * cutting the stem 2 inches above ground level and applying a 25% solution of glyphosate or triclopyr and water to the cross-sectioned area * spraying larger infestations with a 2% solution of glyphosate or triclopyr and water When yanking Japanese knotweed from the soil, it is imperative to remove all portions of the root to prevent the plant from cropping up again where you’ve just tried to eradicate it.
