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What do Japanese knotweed stems look like in winter?
By The JKL Team

What do Japanese knotweed stems look like in winter?

Question: What do Japanese knotweed stems look like in winter?

Answer: In winter, Japanese Knotweed stems dry out, becoming brown and brittle, in contrast to their lush appearance in summer.

A Closer Look: 

During the winter months, Japanese Knotweed (Fallopia japonica) undergoes a significant transformation that makes its stems easy to identify. The lush green stems of summer, adorned with purple speckles, dry out and become brown and brittle. This change in color and texture is a stark contrast to the plant’s appearance in the growing season. The once-hollow stems now become more fragile and can snap easily.

These brown, brittle canes often remain standing throughout the winter, providing a clear visual indicator of the plant’s presence even when the foliage has fallen away. Recognizing these winter characteristics is crucial for identifying and managing Japanese Knotweed during its dormant period, ensuring timely intervention before the next growing season.

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