Japanese knotweed (Fallopia japonica) is identifiable by its distinctive heart-shaped leaves with a flat base, hollow bamboo-like stems with purple-red speckles, and small creamy-white flowers in late summer. In spring, new shoots emerge as red-purple spears before leaves unfurl.
Japanese Knotweed Identification
How to identify Japanese knotweed — signs to look for at different times of year.
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