Pinkhead knotweed plants (Polygonum capitatum orPersicaria capitata) are considered excellent low-growing groundcover by some gardeners. They are also called invasive pests by others. If you read up on pink knotweed information, you’ll find that the plant is banned in England and considered invasive in California. This is because of its tendency to spread where it wasn’t invited.
In our Sunnyvale garden (Zone 9), we grow pink knotweed in a narrow patch in an interior courtyard. We welcome its growth in adverse conditions of sun-reflected heat and winter rain flooding. We have had no volunteer plants escaping to the rest of the exterior gardens.
Toxic to cats and dogs
| Family: | Polygonaceae |
| Genus: | Persicaria (per-sih-KAR-ee-uh) (Info) |
| Species: | capitata (kap-ih-TAY-tuh) (Info) |
| Synonym: | Polygonum capitatum |
Read more: http://davesgarden.com/guides/pf/go/363/#ixzz3yfd8onqfBloom Characteristics:
Water Requirements:
Average Water Needs; Water regularly; do not overwater
Where to Grow:
Height:
under 6 in. (15 cm)
Spacing:
15-18 in. (38-45 cm)
Hardiness:
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure:
Sun to Partial Shade
Danger:
Bloom Color:
Pink
Bloom Time:
Mid Spring
Blooms repeatedly
Foliage:
Variegated
Other details:
May be a noxious weed or invasive
Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information:
Propagation Methods:
From herbaceous stem cuttings
Seed Collecting:
Read more: http://davesgarden.com/guides/pf/go/363/#ixzz3yfbzNMG5
