Persicaria affinis 'Superba'

Tried and Trouble-free Recommended by 1 Professionals
Common Name: knotweed
Type: Herbaceous perennial
Family: Polygonaceae
Zone: 5 to 8
Height: 0.25 to 0.50 feet
Spread: 1.00 to 1.50 feet
Bloom Time: July to September
Bloom Description: Pink
Sun: Full sun
Water: Medium
Maintenance: Low
Suggested Use: Ground Cover, Naturalize
Flower: Showy
Tolerate: Deer, Drought


Easily grown in average, medium moisture soils in full sun. Tolerates light shade. Best in organically rich, moisture-retentive soils in full sun. Soils should be kept consistently moist.

Noteworthy Characteristics

‘Superba’ is a vigorous compact cultivar of Himalayan fleece flower. It is a low-growing, mat-forming perennial that grows to 4-6” tall and spreads indefinitely by trailing stems to form an attractive ground cover. Mostly basal, deep green leaves are narrow oblanceolate (to 4” long). Leaves turn bronze in fall. Dense, erect, 3-inch spikes of tiny pink flowers appear above the foliage mat over a long, early summer to fall bloom period. Synonymous with Polygonum affine ‘Superba’. The cultivar ‘Superba’ is also considered to be synonymous with ‘Dimity’.


No serious insect or disease problems.

Garden Uses

Edging for border fronts. Rock gardens. Excellent ground cover. Also appropriate for stream or pond banks. Containers.