Polygonum hydropiper

Persicaria trigonocarpa

Persicaria trigonocarpa, also known as Polygonum trigonocarpa, is a perennial plant native to East Asia, including Korea. The following describes the growth characteristics, propagation methods, cultivation methods, garden uses, and important pest and disease control methods for Polygonum trigonocarpa.

Growth Characteristics
- Environment: It prefers water and thrives in moist soil. While it prefers sunny locations, it can also grow in partial shade.
- Size: It typically grows to a height of 30–100 cm and is characterized by broad leaves and red stems.
- Flowers: It blooms with small pink flowers from July to September.

Propagation Methods
- Seed Propagation: Collect mature seeds in the autumn and sow them in the spring.
- Division Propagation: It can be propagated by dividing the roots. Division should be performed in the spring or autumn.

Cultivation Methods
- Soil: Well-drained loam or sandy loam is preferable. Maintain consistent moisture levels but avoid excessive moisture. - Watering: Avoid excessive drought and provide sufficient water.
- Fertilizer: Use general horticultural fertilizers to provide the basic nutrients required by the plant.

Garden Use
- Border Plant: Its beautiful pink flowers make it suitable as a border plant or for landscaping.
- Riparian Planting: Since it prefers moisture, it can be used as a planting for pond edges or watersides.

Important Pests and Control Methods
- Diseases: Although relatively resistant to disease, it can be susceptible to fungal diseases if the environment is humid; therefore, maintain ventilation and ensure good drainage.
- Pests: It may be susceptible to leaf beetles or aphids. Remove them by washing with water or soapy water; if the situation is severe, use an appropriate insecticide.

Polygonum hydropiper is a hardy and relatively easy-to-care-for plant that can be utilized in various environments. With proper care, it will add beautiful and lush greenery to your garden.

Plant Type
Plant Family	Knotweed family
Height	30∼50cm
Spread
Colors	red
Bloom Period	August to October
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-20°C

Sticky knotweed
Persicaria viscofera

Knotweed
Persicaria taquetii