Milkwort Knotweed

Polygonum polygaloides

Native to:
Canada, United States
Milkwort Knotweed

Dean Wm. Taylor (www.flickr.com)

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Polygonaceae
Genus:
Polygonum
Species:
Polygonum polygaloides
USDA Symbol:
POPO4

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
30 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
may,jun,jul,aug
Bloom Colors:
white, pink

Garden & Ecology Notes

Wildlife Value:
birds

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Commonly found in alpine and subalpine regions

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds germinate best with cold stratification and consistent moisture.

The above propagation data sourced from Claude AI