Polygonum emodi
Knotweed, Smartweed
Family: Polygonaceae Buckwheat
| Type | Perennial |
| USDA Hardiness range | 7A - 9A |
| Exposure | Partial shade to full sun |
| Bloom color | Red |
| Bloom time | Mid Summer |
| Water needs | Moist |
| Landscape uses | Border, ground cover |
| Height | 10" to 12" / 25cm to 30cm |
| Spread | n/a |
| Growth rate | Moderate |
| Leaf color | Green |
| Fruit color | n/a |
| Soil pH requirements | Neutral |
| Soil type | Sandy, loamy |
| Form | Spreading or horizontal |
| Attributes and features | Attractive foilage |