Persicaria bistorta
Hairy Knotweed
Persicaria attenuata
(R.Br.) Soják Species
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- Botanical name
- Persicaria attenuata
- Also known as
- Hairy Knotweed, Watersmart Weed
- Family
- Polygonaceae
- Genus
- Persicaria
- Reference
- World Flora Online
How to grow Hairy Knotweed
We have not written a growing guide for this species yet.
GardenDecoded's botanical data covers every accepted species, but growing advice is written by hand rather than imported — so it exists only for the plants we have worked through so far. The botanical detail above is complete and sourced.
Other names for this plant
These names have all been used for Persicaria attenuata but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.
Polygonum attenuatum
Others in Persicaria
GardenDecoded is an educational gardening reference. Botanical data comes from World Flora Online and GBIF; growing guidance is our own. Always check a plant's toxicity and local invasiveness status before planting, and never eat or apply a plant based on this site alone.