For more information visit Midwest Invasive Species Information Network (MISIN). Giant knotweed is very difficult to remove from an area after it has been introduced because of how aggressive it is.

typically grows to be 10 feet tall with stems that are hollow like bamboo spade-shaped leaves with pointed tips and flat bases that are smaller than the leaves of invasive giant knotweed produces ...

Native to Asia, knotweeds were introduced to North America as an ornamental plant. They can spread into natural areas growing quickly and forming dense monocultures, reducing habitat diversity, ...

The rhizomes are nearly impossible to eradicate ... The critters are doing a number on giant knotweed, which is also going ...