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How can I identify Japanese Knotweed during summer?
By The JKL Team

How can I identify Japanese Knotweed during summer?

Question: What distinctive features does Japanese Knotweed have in summer?

Answer: Japanese Knotweed in summer is characterized by its large, green leaves up to 200mm long, semi-dense stands of tall canes, and clusters of creamy-white flowers.

A Closer Look: 

In summer, Japanese Knotweed (Fallopia japonica) exhibits several distinctive features that make it identifiable. The plant is characterized by its large, green leaves, which can grow up to 200mm in length. These leaves are typically heart or shovel-shaped, with a pointed tip and a flat base, and are arranged in an alternate pattern along the stem, forming a dense canopy.

Another key feature is the semi-dense stands of tall canes, which can reach heights of 3 to 3.5 meters. These canes resemble bamboo and have a hollow, segmented structure with a reddish-brown speckling. During late summer, Japanese Knotweed produces clusters of creamy-white flowers that appear in elongated panicles. These flower clusters add to the plant’s dense and towering appearance, making it easier to identify during this season

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