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What are the distinguishing features of Japanese Knotweed leaves?
By The JKL Team

What are the distinguishing features of Japanese Knotweed leaves?

Question: What are the distinguishing features of Japanese Knotweed leaves?

Answer: Japanese Knotweed leaves are shovel-shaped (not heart-shaped), with each leaf having a point at the tip and arranged in a zig-zag pattern on the stem, growing up to 200mm in length.

A Closer Look: 

Japanese Knotweed (Fallopia japonica) leaves are characterized by their unique shovel-shaped form, distinguishing them from heart-shaped leaves of other plants. Each leaf features a pointed tip and can grow up to 200mm in length. This pointed, shovel-like shape is a key identifier for recognizing Japanese Knotweed in the field.

Additionally, the leaves are arranged in a distinctive zig-zag pattern along the stem. This alternate leaf arrangement further aids in identifying the plant, as it creates a staggered appearance that is easy to spot. The leaves’ size, shape, and arrangement collectively serve as reliable indicators for identifying Japanese Knotweed, particularly during the growing season when the foliage is lush and green​

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