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When does Japanese Knotweed flower?
By The JKL Team

When does Japanese Knotweed flower?

Question: What do Japanese Knotweed flowers look like?

Answer: Japanese Knotweed typically begins to flower in late summer, around the end of August and early September.

A Closer Look: 

Japanese Knotweed (Fallopia japonica) typically begins to flower in late summer, around the end of August and early September. These flowers are creamy white and grow in elongated clusters known as panicles. Each panicle is approximately 0.5cm wide and can extend up to 10cm in length. The dense, fluffy-looking flower clusters stand out prominently against the plant’s large, green, shovel-shaped leaves.

The flowers are an important identification feature, as they help distinguish Japanese Knotweed from other plants during the blooming period. Recognizing these creamy white, elongated flower clusters amidst the lush green foliage is crucial for identifying and managing this invasive species effectively, ensuring timely intervention to prevent its spread and mitigate its impact on the environment and properties

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