Knotweed, Japanese

Regulated Act: Alberta Weed Control Act

Provincial Designation: Prohibited Noxious

Colour: White

Latin Name: Fallopia japonica

Fact Sheet1: Click Here to View/Download PDF

A close up of leaves on the ground
A plant that is growing in the ground.
A patch of green plants growing in the middle of a field.
A large tree is growing in the middle of a river.
A person holding onto the branch of a tree
A close up of the leaves on a tree
A close up of the flower buds on a plant

Japanese Knotweed Flower CloseUp Photo Credit Joseph M. DiTomaso, University of California - Davis, Bugwood.org

A close up of the flowers and leaves of a plant.

Japanese Knotweed Flowers Photo Credit Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

A man standing in front of some bushes
A wooden stick with a hole in it

Japanese Knotweed Hollow Stem Photo Credit Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

A close up of the leaves on a plant

Japanese Knotweed Leaves Photo Credit Steve Manning, Invasive Plant Control, Bugwood.org

A close up of some plants growing in the dirt

Japanese Knotweed New Shoots Photo Credit Rob Routledge, Sault College, Bugwood.org

A close up of the leaves on a tree

Japanese Knotweed Seed Pods Photo Credit Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

A plant that is growing in the dirt.

Japanese Knotweed Seedling Photo Credit Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

A close up of the leaves on a bush

Japanese Knotweed Stalk Photo Credit Karan A. Rawlins, University of Georgia, Bugwood.org

A close up of the branches and leaves on a tree.

Japanese Knotweed Stalk and Nodes Photo Credit Ansel Oommen, Bugwood.org

A plant with leaves and stems growing in the forest.

Japanese Knotweed Young Stalk Photo Credit Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

A plant that is growing in the ground.