Cultivated Knotweed

Koenigia polystachya

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Polygonaceae
Genus:
Koenigia
Species:
Koenigia polystachya

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
3-4 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
jun, jul, aug, sep, oct, nov
Bloom Colors:
white

Native Range

United States: California, Massachusetts, Montana, Oregon, Washington, Canada: British Columbia, Nova Scotia

Soil Requirements

Soil Type:
moist, fertile, well-drained loamy soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
good drainage required
Moisture:
consistently moist
Notes:
prefers high-altitude regions with ample rainfall