Narrowleaf Knotweed
Polygonum bellardii
C. Allioni
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Polygonaceae
- Genus:
- Polygonum
- Species:
- Polygonum bellardii
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 1-2 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may, jun, jul, aug, sep, oct, nov
- Bloom Colors:
- pink, white
- Ground Cover:
- Yes
Native Range
United States: Arkansas, California, Colorado, Connecticut, District of Columbia, Delaware, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Minnesota, Missouri, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Vermont, Wisconsin, Canada: Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan
Host Plant for Caterpillars
Bronzed Cutworm (Nephelodes minians), Dark-barred Twin-spot Carpet (Xanthorhoe ferrugata), Flounced Chestnut (Agrochola helvola), Grammia virguncula, Lucerne Moth (Nomophila nearctica), many-lined carpet moth (Anticlea multiferata), Ornate Tiger Moth (Grammia ornata), sentinel wave moth (Scopula sentinaria), underworld dart (Agrotis subterranea), Variable Carpet Moth (Orthonama centrostrigaria), Variegated cutworm (Peridroma saucia), Yellow-legged Tiger Moth (Haematopis grataria), Acmon blue (Plebejus acmon), Epidemia helloides
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- often found in disturbed areas and open habitats