Persicaria affinis ‘Darjeeling Red’

Knotweed 'Darjeeling Red'

Bistorta affinis ‘Darjeeling Red’ is a mat-forming perennial that creates dense ground cover with lance-shaped leaves that often flush red in autumn. From summer into early autumn, its flower spikes open pink before deepening to rich red tones. Awarded the RHS Award of Garden Merit, it is disease-free, pest-free, and highly valued by Irish gardeners for edging paths and filling gaps with long-lasting colour.

Flowering Months

Jan J

Feb F

Mar M

Apr A

May M

Jun J

Jul J

Aug A

Sep S

Oct O

Nov N

Dec D

Size

Max Height

0.1 m — 0.5 m

Max Spread

0.1 m — 0.5 m

Growth Habit

Spreads horizontally along ground, forming dense flat ground cover.

Planting Position

Sunlight i Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.

Full Sun Part Shade

Aspect i Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.

North South East West

Exposure i Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.

Exposed / Sheltered

Hardiness i Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.

(< −20 °C) Extremely hardy

Ideal Soil Conditions

Soil Type i Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.

Chalk Clay Loam Sand

Soil Moisture i Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.

Moist but permeable / Poorly-drained / Free draining

Soil pH i Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.

Acid Alkaline Neutral

Plant Uses & Merits

Uses

Patios / Courtyards
Coastal Areas
Containers
Rockeries
Edging
Flower Borders
Groundcover

Merits

Generally disease-free
Generally pest-free
No pruning required
RHS | Award Of Garden Merit

Persicaria affinis ‘Darjeeling Red’

Knotweed 'Darjeeling Red'

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Persicaria affinis ‘Darjeeling Red’

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