| Scientific Name: |
Polygonum amphibium |
| Common Name: |
Water Knotweed |
| Duration of Life: |
Perennial |
| Bloom Color: |
Yellow |
| Plant Origin: |
Native |
| Soil Type prefered: |
Loam, Clay |
| Drought Tolerance: |
None |
| Flower Conspicuous: |
No |
| Soil Fertility Requirement: |
Medium |
| Moisture Use: |
High |
| Shade Tolerance: |
Intolerant |
| Active Growth Period: |
Summer |
| Anaerobic Tolerance: |
High |
| Calcium Carbonate Tolerance: |
Medium |
| Bloom Period: |
Late Spring |
| Commercial Availability: |
Routinely Available |
| Cold Stratification Required: |
No |
| Fall Conspicuous: |
No |
| Frost Free Days, Minimum: |
110 |
| Foliage Color: |
Green |
| Fruit/Seed Abundance: |
Low |
| Fruit/Seed Period Begin: |
Summer |
| Fruit/Seed Conspicuous: |
No |
| Fruit/Seed Period End: |
Fall |
| Fruit/Seed Color: |
Brown |
| Fruit/Seed Persistence: |
No |
| Fire Tolerance: |
Medium |
| Foliage Texture: |
Medium |
| Growth Form: |
Rhizomatous |
| Growth Habit: |
Forb/herb |
| Growth Rate: |
Moderate |
| Height, Mature (feet): |
.1 |
| Leaf Retention: |
No |
| Low Growing Grass: |
No |
| Life Span: |
Moderate |
| pH (Maximum): |
7 |
| pH (Minimum): |
4 |
| Precipitation (Minimum): |
14 |
| Resprout Ability: |
No |
| Root Depth, Min. (inches): |
6 |
| Salt Tolerance: |
None |
| Shape and Orientation: |
Prostrate |
| Small Grain: |
No |
| Seed per Pound: |
125000 |
| Seed Spread Rate: |
Moderate |
| Seedling Vigor: |
Low |
| Temperature, Minimum (F): |
-23 |
| Toxicity: |
None |
| Vegetative Spread Rate: |
Slow |
| Propagation: |
Seed |
| Palpable: (eatable) |
Graze Animal (Medium) |
| Category: |
Dicot |
| Division: |
Magnoliophyta |
| Class: |
Magnoliopsida |
| Order: |
Polygonales |
| Family: |
Polygonaceae |
| Genus: |
Polygonum |
