Pollinator plant

Prostrate Knotweed

Polygonum aviculare

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Common names

77 names · 37 languages
EnglishYour language
+13 more namesShow fewer names
Other languages (36)
Dutch
French
Afrikaans
  • duisendknoop[3]
  • Duizendknoop[3]
  • kamferfoelie[3]
+7 more namesShow fewer names
  • lidgras[3]
  • lidtjies-gras[3]
  • lit-gras[3]
  • Varkgras[3]
  • voelduisendknoop[3]
  • voėlduisendknoop[3]
  • Wire weed[3]
Arabic
  • بطباط الطيور[3]
  • عصا الراعي[3]
Belarusian
  • Драсён птушыны, ці Спарыш[3]
Bulgarian
  • Пача трева[3]
Catalan
  • Passacamins[3]
Chinese (Simplified)
+1 more nameShow fewer names
Chinese (Traditional)
Czech
  • truskavec ptačí[3]
Danish
  • Vej-pileurt[3]
Estonian
  • erilehine linnurohi[3]
Faroese
  • smáfuglabløðkuurt[3]
Finnish
  • kotipihatatar[3]
  • pihatatar[3]
German
  • Echter Vogelknöterich[2][3]
Greek
  • Πολυκόμπι[3]
Hebrew
  • ארכובית צרת-עלים[3]
Hungarian
  • madárkeserűfű[3]
Italian
Japanese
  • ミチヤナギ[3]
Korean
Lithuanian
  • Paprastoji takažolė[3]
Mapudungun
  • Sanchukachu[3]
Norwegian
Polish
  • Rdest ptasi[3]
Portuguese
+1 more nameShow fewer names
Romanian
Russian
  • Горец птичий[3]
  • Спорыш птичий[3]
Slovak
  • Stavikrv vtáčí[3]
Slovenian
  • ptičja dresen[3]
Sotho
  • lira-ha-li-bonoe[3]
  • moraran 'a letsana[3]
  • moraran 'a nokana[3]
Spanish
Swedish
Turkish
Ukrainian
  • Гірчак звичайний[3]
  • Спориш звичайний[3]
Welsh
  • berw'r ieir[3]
Sources & name notes (3)

Names recorded in our plant catalogue and botanical sources, grouped by language. Usage can vary by region.

Catalogue language labels are reviewed separately from botanical source records.

Numbered references identify names recorded by an external source. Other names are from our plant catalogue.

[1] Polygonum aviculare — Plant Toolbox common names ↗

NC State Extension Gardener Plant Toolbox; English common names in a United States horticultural reference.

Source records
  • Doorweed — ul#common_names > li:nth-of-type(2); heading: Common Name(s):; Polygonum aviculare.
  • Birdweed — ul#common_names > li:nth-of-type(1); heading: Common Name(s):; Polygonum aviculare.
  • Knotgrass — ul#common_names > li:nth-of-type(3); heading: Common Name(s):; Polygonum aviculare.
  • Lowgrass — ul#common_names > li:nth-of-type(4); heading: Common Name(s):; Polygonum aviculare.
  • Pigweed — ul#common_names > li:nth-of-type(5); heading: Common Name(s):; Polygonum aviculare.
  • Prostrate Knotweed — ul#common_names > li:nth-of-type(6); heading: Common Name(s):; Polygonum aviculare.
  • Wiregrass — ul#common_names > li:nth-of-type(7); heading: Common Name(s):; Polygonum aviculare.
[2] Polygonum aviculare — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy. This is a common-name attestation, not an independent botanical determination.

Source records
  • Echter Vogelknöterich — results[1].names[8]; taxon id 78678; Polygonum aviculare.
  • Bird Knotgrass — results[1].names[50]; taxon id 78678; Polygonum aviculare.
  • Bird Knotweed — results[1].names[51]; taxon id 78678; Polygonum aviculare.
  • Common Knotgrass — results[1].names[24]; taxon id 78678; Polygonum aviculare.
  • Dooryard Knotweed — results[1].names[7]; taxon id 78678; Polygonum aviculare.
  • Dooryard Weed — results[1].names[52]; taxon id 78678; Polygonum aviculare.
  • Hog Weed — results[1].names[53]; taxon id 78678; Polygonum aviculare.
  • Hogweed — results[1].names[54]; taxon id 78678; Polygonum aviculare.
  • Prostrate Knotweed — results[1].names[1]; taxon id 78678; Polygonum aviculare.
  • Wire Weed — results[1].names[55]; taxon id 78678; Polygonum aviculare.
  • Wireweed — results[1].names[4]; taxon id 78678; Polygonum aviculare.
  • Sanguinaria europea — results[1].names[2]; taxon id 78678; Polygonum aviculare.
  • renouée des oiseaux — results[1].names[6]; taxon id 78678; Polygonum aviculare.
  • Renouée Traînasse — results[1].names[65]; taxon id 78678; Polygonum aviculare.
  • Traînasse — results[1].names[66]; taxon id 78678; Polygonum aviculare.
  • Erba curzola — results[1].names[20]; taxon id 78678; Polygonum aviculare.
  • Gewoon varkensgras — results[1].names[13]; taxon id 78678; Polygonum aviculare.
  • corriola-bastarda — results[1].names[60]; taxon id 78678; Polygonum aviculare.
  • erva-das-galinhas — results[1].names[61]; taxon id 78678; Polygonum aviculare.
  • erva-dos-passarinhos — results[1].names[62]; taxon id 78678; Polygonum aviculare.
  • sempre-noiva — results[1].names[17]; taxon id 78678; Polygonum aviculare.
[3] Polygonum aviculare — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy; common-name attestation, not an independent botanical determination.

Source records
  • Echter Vogelknöterich — results[20].names[8]; taxon id 78678; Polygonum aviculare.
  • Bird Knotgrass — results[20].names[50]; taxon id 78678; Polygonum aviculare.
  • Bird Knotweed — results[20].names[51]; taxon id 78678; Polygonum aviculare.
  • Common Knotgrass — results[20].names[24]; taxon id 78678; Polygonum aviculare.
  • Dooryard Knotweed — results[20].names[7]; taxon id 78678; Polygonum aviculare.
  • Dooryard Weed — results[20].names[52]; taxon id 78678; Polygonum aviculare.
  • Hog Weed — results[20].names[53]; taxon id 78678; Polygonum aviculare.
  • Hogweed — results[20].names[54]; taxon id 78678; Polygonum aviculare.
  • Prostrate Knotweed — results[20].names[1]; taxon id 78678; Polygonum aviculare.
  • Wire Weed — results[20].names[55]; taxon id 78678; Polygonum aviculare.
  • Wireweed — results[20].names[4]; taxon id 78678; Polygonum aviculare.
  • Sanguinaria europea — results[20].names[2]; taxon id 78678; Polygonum aviculare.
  • renouée des oiseaux — results[20].names[6]; taxon id 78678; Polygonum aviculare.
  • Renouée Traînasse — results[20].names[65]; taxon id 78678; Polygonum aviculare.
  • Traînasse — results[20].names[66]; taxon id 78678; Polygonum aviculare.
  • Erba curzola — results[20].names[20]; taxon id 78678; Polygonum aviculare.
  • Gewoon varkensgras — results[20].names[13]; taxon id 78678; Polygonum aviculare.
  • corriola-bastarda — results[20].names[60]; taxon id 78678; Polygonum aviculare.
  • erva-das-galinhas — results[20].names[61]; taxon id 78678; Polygonum aviculare.
  • erva-dos-passarinhos — results[20].names[62]; taxon id 78678; Polygonum aviculare.
  • sempre-noiva — results[20].names[17]; taxon id 78678; Polygonum aviculare.
  • pihatatar — results[20].names[5]; taxon id 78678; Polygonum aviculare.
  • truskavec ptačí — results[20].names[9]; taxon id 78678; Polygonum aviculare.
  • ミチヤナギ — results[20].names[10]; taxon id 78678; Polygonum aviculare.
  • 扁蓄 — results[20].names[11]; taxon id 78678; Polygonum aviculare.
  • Vej-pileurt — results[20].names[12]; taxon id 78678; Polygonum aviculare.
  • Trampört — results[20].names[14]; taxon id 78678; Polygonum aviculare.
  • Горец птичий — results[20].names[15]; taxon id 78678; Polygonum aviculare.
  • Спорыш птичий — results[20].names[16]; taxon id 78678; Polygonum aviculare.
  • tungras — results[20].names[18]; taxon id 78678; Polygonum aviculare.
  • Пача трева — results[20].names[19]; taxon id 78678; Polygonum aviculare.
  • kotipihatatar — results[20].names[21]; taxon id 78678; Polygonum aviculare.
  • Rdest ptasi — results[20].names[22]; taxon id 78678; Polygonum aviculare.
  • Passacamins — results[20].names[23]; taxon id 78678; Polygonum aviculare.
  • بطباط الطيور — results[20].names[25]; taxon id 78678; Polygonum aviculare.
  • عصا الراعي — results[20].names[26]; taxon id 78678; Polygonum aviculare.
  • Paprastoji takažolė — results[20].names[27]; taxon id 78678; Polygonum aviculare.
  • 마디풀 — results[20].names[28]; taxon id 78678; Polygonum aviculare.
  • erilehine linnurohi — results[20].names[29]; taxon id 78678; Polygonum aviculare.
  • Πολυκόμπι — results[20].names[30]; taxon id 78678; Polygonum aviculare.
  • 扁蓄 — results[20].names[31]; taxon id 78678; Polygonum aviculare.
  • kadımalak — results[20].names[32]; taxon id 78678; Polygonum aviculare.
  • kuşekmeği — results[20].names[33]; taxon id 78678; Polygonum aviculare.
  • smáfuglabløðkuurt — results[20].names[34]; taxon id 78678; Polygonum aviculare.
  • Спориш звичайний — results[20].names[35]; taxon id 78678; Polygonum aviculare.
  • ptičja dresen — results[20].names[36]; taxon id 78678; Polygonum aviculare.
  • 萹蓄 — results[20].names[37]; taxon id 78678; Polygonum aviculare.
  • Драсён птушыны, ці Спарыш — results[20].names[38]; taxon id 78678; Polygonum aviculare.
  • duisendknoop — results[20].names[40]; taxon id 78678; Polygonum aviculare.
  • Duizendknoop — results[20].names[41]; taxon id 78678; Polygonum aviculare.
  • kamferfoelie — results[20].names[42]; taxon id 78678; Polygonum aviculare.
  • lidgras — results[20].names[43]; taxon id 78678; Polygonum aviculare.
  • lidtjies-gras — results[20].names[44]; taxon id 78678; Polygonum aviculare.
  • lit-gras — results[20].names[45]; taxon id 78678; Polygonum aviculare.
  • Varkgras — results[20].names[46]; taxon id 78678; Polygonum aviculare.
  • voelduisendknoop — results[20].names[47]; taxon id 78678; Polygonum aviculare.
  • voėlduisendknoop — results[20].names[48]; taxon id 78678; Polygonum aviculare.
  • Wire weed — results[20].names[49]; taxon id 78678; Polygonum aviculare.
  • lira-ha-li-bonoe — results[20].names[56]; taxon id 78678; Polygonum aviculare.
  • moraran 'a letsana — results[20].names[57]; taxon id 78678; Polygonum aviculare.
  • moraran 'a nokana — results[20].names[58]; taxon id 78678; Polygonum aviculare.
  • Troscot — results[20].names[59]; taxon id 78678; Polygonum aviculare.
  • madárkeserűfű — results[20].names[63]; taxon id 78678; Polygonum aviculare.
  • Гірчак звичайний — results[20].names[64]; taxon id 78678; Polygonum aviculare.
  • ארכובית צרת-עלים — results[20].names[67]; taxon id 78678; Polygonum aviculare.
  • Stavikrv vtáčí — results[20].names[68]; taxon id 78678; Polygonum aviculare.
  • berw'r ieir — results[20].names[69]; taxon id 78678; Polygonum aviculare.
  • Sanchukachu — results[20].names[70]; taxon id 78678; Polygonum aviculare.
  • 猪牙草 — results[20].names[71]; taxon id 78678; Polygonum aviculare.
  • 猪牙菜 — results[20].names[72]; taxon id 78678; Polygonum aviculare.
  • Köy Otu — results[20].names[73]; taxon id 78678; Polygonum aviculare.
Plant references

Source-backed information

Published observations for this plant. Each reference supports the information beside it.

Botanical family
Polygonaceae

Genus-level classification for Polygonum; this does not confirm the complete catalogue name.

Sources [1]
Taxonomy
NC State Extension publishes a profile under Polygonum aviculare.

Profile-name match; no accepted-name status is asserted.

Sources [2]
Mature height
0.08–0.2 m

NC State Extension profile. Converted from the source range in feet and inches; mature size varies with growing conditions.

Sources [2]
Mature spread
0.61–0.91 m

NC State Extension profile. Converted from the source range in feet and inches; mature size varies with growing conditions.

Sources [2]
Plant habit
Prostrate; Spreading

NC State Extension profile.

Sources [2]
Life cycle
Annual; Perennial

NC State Extension profile.

Sources [2]
Growth rate
Slow

NC State Extension profile.

Sources [2]
Foliage
Broadleaf Evergreen

NC State Extension profile.

Sources [2]
Light
Full sun (6 or more hours of direct sunlight a day); Partial Shade (Direct sunlight only part of the day, 2-6 hours)

NC State Extension profile.

Sources [2]
Moisture and drainage
Good Drainage; Moist; Occasionally Dry

NC State Extension profile.

Sources [2]
Soil texture
Clay; Sand; Shallow Rocky

NC State Extension profile.

Sources [2]
Soil pH
Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)

NC State Extension profile. These source categories do not certify the catalogue’s numeric pH interval.

Sources [2]
Flowering season
Autumn; Summer

NC State Extension profile. Seasons reflect the source region and do not verify the catalogue’s exact flowering months.

Sources [2]
Native range
Macaronesia and Eurasia

NC State Extension profile. Origin reported by the source; this is not a claim of local nativeness.

Sources [2]
Catalogue ratings

Who this plant supports

Honey bees

Low suitability
Nectar value Low
Pollen value Unknown
Plant profile

About this plant

Doorweed (Polygonum aviculare) is a herbaceous plant. It flowers from May to November.

Sources and references

References for the information marked with source numbers on this page.

Sources checked
  1. Catalogue of Life Polygonum — Catalogue of Life COL26.8

    COL26.8 (2026-08-20). Contributing checklist: Synonymic Checklists of the Vascular Plants of the World. This is taxonomic evidence, not an independent ecological study.

    Supports: Botanical family
    Relevant sections
    • Botanical family: NameUsage.tsv line 1899780; ID 63NFC; rank genus; status accepted

    Source checked on .

    Source data licence: CC BY 4.0.

  2. NC State Extension Polygonum aviculare — Plant Toolbox

    NC State Extension Gardener Plant Toolbox. Growing conditions and seasons reflect its United States horticultural context.

    Supports: TaxonomyMature heightMature spreadPlant habitLife cycleGrowth rateFoliageLightMoisture and drainageSoil textureSoil pHFlowering seasonNative range
    Relevant sections
    • Taxonomy: Main botanical heading (h1)
    • Mature height: Dimensions / Height
    • Mature spread: Dimensions / Width
    • Plant habit: Habit/Form
    • Life cycle: Life Cycle
    • Growth rate: Growth Rate
    • Foliage: Woody Plant Leaf Characteristics
    • Light: Light
    • Moisture and drainage: Soil Drainage
    • Soil texture: Soil Texture
    • Soil pH: Soil pH
    • Flowering season: Flower Bloom Time
    • Native range: Country Or Region Of Origin

    Source checked on .