Polygonum 'Blackfield'

Persicaria amplexicauli 'Blackfield'

Growth Characteristics

Persicaria amplexicaulis 'Blackfield' is a perennial herbaceous plant belonging to the Polygonaceae family. It grows to a height of approximately 80–120 cm and blooms with red flowers from summer to autumn. Its slender, long spike-shaped inflorescences add a unique atmosphere to the garden. It thrives in partial shade to full sun and prefers relatively moist conditions.

Propagation Methods

Persicaria amplexicaulis 'Blackfield' is primarily propagated by root division and seed sowing. It can be easily propagated by dividing and planting roots in spring or autumn. If using seeds, it is best to sow them in early spring or autumn. It grows well in moist yet well-drained soil.

Cultivation Methods
 - Soil: It thrives in soil rich in organic matter and with good drainage. Care must be taken to prevent the soil from drying out.
 - Location: It grows well anywhere from partial shade to full sun, and thrives particularly in warm temperatures during the summer.
 - Watering: Continuous watering is required. It is important to keep the soil moist at all times, especially during the summer.
 - Fertilization: You can provide additional nutrients by using slow-release fertilizers in the spring.
 - Pruning: If necessary, you can prune for aesthetic purposes after the flowers have faded.

Uses in the Garden
Polygonum 'Blackfield' fits well in natural gardens, waterside gardens, or modern garden styles. It harmonizes with plants of various colors and creates a beautiful landscape even when planted in groups.

Important Pests and Control Methods
Polygonum 'Blackfield' is relatively resistant to pests and diseases, but caution is required as the leaves may become infected with fungi in overly wet environments.
- Diseases: Since fungal diseases may occur, it is recommended to plant it in a well-ventilated location. If a problem arises, use an appropriate fungicide or cut off the infected parts.
- Pests: While not a major issue, aphids may appear. They can be removed using organic pesticides or soapy water. Based on this information, you can cultivate and manage the knotweed 'Blackfield' healthily.

Plant Type
Plant Family	Knotweed family
Height	60~90cm
Spread	60~90cm
Colors	red
Bloom Period	July~August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

Knotweed 'Firetail'
Persicaria amplexicaulis 'Firetail'

Polygonum atrosanguinia
Persicaria amplexicaulis 'Atrosanguinea'