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(Persicaria filiformis)
Knotweed (Persicaria filiformis)
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harum.koh
CC BY-SA 2.0
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harum.koh
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CC BY-SA 2.0
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Photo by: harum.koh | License Type: CC BY-SA 2.0 | License URL: https://creativecommons.org/licenses/by-sa/2.0/ | Uploader: harum.koh | Publisher: Flickr |
Estimated Native Range
Summary
Persicaria filiformis, commonly known as Knotweed, is a deciduous perennial herb that is native to a variety of habitats including open woodlands, grasslands, and along streams in East Asia and Southeast Asia. It typically grows to a height of 1-3 feet (0.3-0.9 meters) and a width of 1 foot (0.3 meters). The plant features slender stems and lance-shaped leaves, and during the summer and fall, it produces small, inconspicuous greenish-white flowers that are arranged in elongated clusters.
Knotweed is valued for its ability to thrive in a range of light conditions, from full sun to full shade, making it versatile for garden design. It is often used in border plantings, as ground cover, or for naturalizing areas. It requires medium amounts of water and prefers soils with medium drainage. While not known for showy flowers, its foliage can add texture and greenery to garden spaces. Gardeners should be aware that some Persicaria species can be aggressive and may spread beyond their intended area, so monitoring and management may be necessary to prevent unwanted spread.CC BY-SA 4.0
Knotweed is valued for its ability to thrive in a range of light conditions, from full sun to full shade, making it versatile for garden design. It is often used in border plantings, as ground cover, or for naturalizing areas. It requires medium amounts of water and prefers soils with medium drainage. While not known for showy flowers, its foliage can add texture and greenery to garden spaces. Gardeners should be aware that some Persicaria species can be aggressive and may spread beyond their intended area, so monitoring and management may be necessary to prevent unwanted spread.CC BY-SA 4.0
Plant Description
- Plant Type: Herb
- Height: 1-2.5 feet
- Width: 0.4-1 feet
- Growth Rate: Moderate
- Flower Color: Red
- Flowering Season: Summer, Fall
- Leaf Retention: Deciduous
Growth Requirements
- Sun: Full Sun, Part Shade, Full Shade
- Water: Medium
- Drainage: Medium
Common Uses
Bee Garden, Bird Garden, Butterfly Garden, Low Maintenance, Showy Flowers
Natural Habitat
Native to open woodlands, grasslands, and along streams in East Asia and Southeast Asia
Other Names
Common Names: Fleece Flower, Japanese Jumpseed
Scientific Names: , Persicaria filiformis, Polygonum filiforme, Antenoron filiforme, Antenoron filiforme f. albiflorum, Persicaria filiformis f. albiflora, Polygonum virginianum var. filiforme, Antenoron filiforme f. smaragdinum, Persicaria muricata f. albiflora, Polygonum nipponense f. albiflorum
GBIF Accepted Name: Persicaria filiformis (Thunb.) Nakai