Persicaria affinis 'Darjeeling Red' (Knotweed 'Darjeeling Red')

Botanical name

Persicaria affinis 'Darjeeling Red'

Other names

Knotweed 'Darjeeling Red', Polygonum affine 'Darjeeling Red'

Genus

Persicaria Persicaria

Variety or Cultivar

'Darjeeling Red' _ 'Darjeeling Red' is a mat-forming, semi-evergreen perennial with large, elliptic to lance-shaped, dark green leaves and, from midsummer to mid-autumn, erect spikes of pink flowers that turn red as they mature.

Native to

Himalayas

Foliage

Semi evergreen

Habit

Mat Forming

Toxicity

Contact with all parts may cause skin irritation. Sap may cause stomach upset if ingested.

Awards

RHS AGM (Award of Garden Merit)

Colour

Flower

Dark-pink, Pale-pink in Summer; Dark-pink, Pale-pink in Autumn

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green, Bronze in Autumn; Bronze in Winter

How to care

Watch out for

Pests

Generally pest-free.

Diseases

Generally disease-free.

General care

Pruning

Deadhead spent flower spikes.

Propagation methods

Division

Monthly care advice

Where to grow

Persicaria affinis 'Darjeeling Red' (Knotweed 'Darjeeling Red') will reach a height of 0.3m and a spread of 0.5m after 5-10 years.

Suggested uses

Cottage/Informal, Beds and borders, Garden edging, Ground Cover, Low Maintenance, Prairie planting, Rock

Cultivation

Plant in any moist, free-draining soil in sun or partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moisture-retentive, Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 8, Zone 7, Zone 6, Zone 5