European Knotweed
Polygonum arenarium
- Native to:
- Albania, Bulgaria, Czechia-Slovakia, East Aegean Is., France, Greece, Hungary, Iran, Iraq, Italy, Kazakhstan, Krym, Lebanon-Syria, Morocco, North Caucasus, NW. Balkan Pen., Palestine, Romania, Russia, Tadzhikistan, Transcaucasus, Türkiye, Türkiye-in-Europe, Turkmenistan, Ukraine, Uzbekistan
Igor Balashov (www.inaturalist.org)
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Polygonaceae
- Genus:
- Polygonum
- Species:
- Polygonum arenarium
- USDA Symbol:
- POAR10
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 40 cm
- Drought Tolerance:
- High
- Bloom Months:
- jun,jul,aug,sep
- Bloom Colors:
- white, pink
Garden & Ecology Notes
- Wildlife Value:
- birds
- Salt Tolerant:
- Yes
Soil Requirements
- Soil Type:
- sandy, nutrient-poor, well-drained soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to sandy coastal areas and dunes
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–28 days
The above propagation data sourced from Claude AI