Polygonum atrosanguinia

Persicaria amplexicauli 'Atrosanguinea'

Knotweed 'Atrosanguinea' (Persicaria amplexicaulis 'Atrosanguinea') is a perennial plant that produces stunning red flowers, providing visual appeal to the garden. The following is information regarding this plant's growth characteristics, propagation methods, cultivation techniques, garden uses, major pests and diseases, and control methods.

Growth Characteristics
- Growth Form: As a perennial plant, it grows to a height of approximately 60 to 120 cm.
- Flowers: Small red flowers bloom densely on long flower stalks from summer to autumn.
- Leaves: Characterized by broad oval leaves that emerge in a wrap-around manner around the stem.
- Habitat: It thrives in well-drained soil and grows well in sunny or slightly shaded areas.

Propagation Methods
- Seeds: Propagation by seeds is possible, but it takes some time.
- Division: It is common to propagate by dividing root clumps in spring or autumn. Cultivation Method
- Soil: It prefers well-drained soil and thrives in soil rich in organic matter.
- Watering: Consistent watering is necessary to prevent the soil from drying out.
- Fertilization: Applying fertilizer once in the spring is sufficient, and it is best to avoid excessive fertilization.
- Pruning: Trim dead leaves and stems in late winter or early spring.

Garden Use
- Ornamental: It is excellent for use as a border plant or background plant and blends harmoniously with other perennials.
- Natural Areas: It is suitable for creating natural areas or wetland gardens.

Important Pests and Control Methods
- Diseases: It is generally resistant to diseases, but root rot may occur due to excessive moisture.
- Pests: Aphids and snails can cause problems.
- Control Methods: If diseases occur, ensure good ventilation and improve drainage. Aphids can be controlled with soapy water, while snails can be removed by hand or using organic pesticides. As such, the knotweed 'Atrosanguinia' is an attractive plant that can add vibrant colors to the garden, and with proper care and observation, it can maintain its beauty for a long time.

Plant Type
Plant Family	Knotweed family
Height	90~120cm
Spread	90~120cm
Colors	red
Bloom Period	July~August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

Polygonum 'Blackfield'
Persicaria amplexicaulis 'Blackfield'

Knotweed 'Superba'
Persicaria bistorta 'Superba'