Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Polygonaceae

Genus:

Reynoutria

Species:

Reynoutria sachalinensis

USDA Symbol:

POSA4

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Forb/herb

Height:

400 cm

Light Requirements:

Full Sun

Drought Tolerance:

Medium

Bloom Months:

jul,aug,sep

Bloom Colors:

white, cream, green

Garden & Ecology Notes

Wildlife Value:

bees

Deer Resistant:

Yes

Salt Tolerant:

Yes

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts vigorously from deep rhizomes after fire or cutting; fire does not control established populations.

Soil Requirements

Soil Type:

rich, well-drained loamy soil

pH:

5.5 - 7.5 (slightly acidic to neutral)

Drainage:

tolerates poor drainage

Moisture:

consistently moist

Notes:

native to riverbanks and moist areas

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–28 days

Notes:

Seeds have low viability; spreads primarily by rhizome fragments. Light may improve germination.

The above propagation data sourced from Claude AI