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Persicaria wallichii
Also called Himalayan knotweed, Kashmir Plume, Cultivated Knotweed, Garden Knotweed, Indian Knotweed
Himalayan knotweed is a fast-spreading perennial herb from the Himalayas, grown as an ornamental and for its sour edible shoots. Its key trait is aggressive spread through rhizomes, so it needs space or containment.
Koenigia polystachya is a species of flowering plant in the knotweed family, known by the common names Himalayan knotweed and cultivated knotweed. It has several regularly used synonyms, including Polygonum polystachyum, Aconogonon polystachyum and Persicaria wallichii.
Koenigia polystachya is native to Asia (southwestern China, Indian Subcontinent, Myanmar, Afghanistan) and it is planted many places as an ornamental. It has the capacity to become an invasive species and has established itself in some parts of North America, primarily the Pacific Coast of the United States and Canada. It is an invasive weed in the mountains of Sri Lanka. The species has also been introduced into Europe, where it is included in the list of invasive alien species of Union concern and hence cannot be imported, bred, transported, commercialized, or intentionally released into the environment in any of the member states of the European Union.
Koenigia alaskana · Alpine Knotweed · Bellflower Knotweed · Davis's Knotweed · Finnish Knotweed · Island purslane · Sikkim Knotweed · Koenigia phytolaccifolia · Chinese Knotweed · Knotweed
Text excerpted from the Wikipedia article Koenigia polystachya by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
