— Short, snippet-friendly answers to the most-asked questions about Knotweed (Polygonum salicifolium). For the full profile with citations, open the main page.
Knotweed, scientifically known as Polygonum salicifolium, is a plant with a widespread native range that includes regions from Afghanistan to Wyoming and various parts of Europe and Asia. Knotweed (Latin: Polygonum salicifolium, family Polygonaceae) is a medicinal plant catalogued in PlantSage.
Knotweed is generally considered safe when used at traditional doses. Always consult a clinician before using any herbal preparation — especially during pregnancy, breastfeeding, while on medication, or for children.
Knotweed is a member of the Polygonaceae family native to ALB, ALG, ANG, ASS, AT, and BAL. Knotweed thrives in moist to wet conditions and prefers light (sandy), medium, or heavy (clay) soils.
Knotweed grows best in 9/10 light and moist, wet water. Detailed sowing, propagation, and care notes are on the full profile.
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