Skip to content
Log inStart trial

Knotweed

Persicaria Affinis 'Superba'

Design with this plant

Overview

Persicaria affinis 'Superba', also known as knotweed, is a robust, mat-forming perennial. It features dense spikes of tiny pink flowers that deepen to red, blooming from mid-summer to fall. With a height of 8-12 inches and a spread of 18-24 inches, its lush, elliptical leaves turn bronzy-green in fall. This low-maintenance ground cover thrives in Zones 4-9, preferring full sun to partial shade and moist, well-drained soil. Ideal for borders or slopes.

Sun Full, HalfWater Extra in Summer, MediumZones 4–7Type Ground cover, PerennialClimate Alpine
Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 104
Knotweed (Persicaria Affinis 'Superba') — It is a delightful choice for gardeners looking for a groundcover that offers both beauty and practicalityKnotweed (Persicaria Affinis 'Superba') — spreading groundcover that adds an eclectic charm to any garden scape; pink flowers that gradually deepen, image 92Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 62Knotweed (Persicaria Affinis 'Superba') — spreading groundcover that adds an eclectic charm to any garden scape; pink flowers that gradually deepen, image 113Knotweed (Persicaria Affinis 'Superba') — Ideal for borders or slopes; elliptical leaves turn bronzy-green in fall, image 91Knotweed (Persicaria Affinis 'Superba') — pink flowers that gradually deepen to a rich crimson as summer progresses into fall, image 53+109

Culture

Sun
Full, Half
Water
Extra in Summer, Medium
USDA zones
4–7

Shape & size

Mature height
0.5–1 Ft.
Mature width
1–2 Ft.

Classification

Type
Ground cover, Perennial
Family
Liliaceae
Climate
Alpine

See full data, regional cultivation notes, and design tools. Build a client presentation around this plant.

Start your 14-day trial

Photos (116)

Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 104
Knotweed (Persicaria Affinis 'Superba') — It is a delightful choice for gardeners looking for a groundcover that offers both beauty and practicality
Knotweed (Persicaria Affinis 'Superba') — spreading groundcover that adds an eclectic charm to any garden scape; pink flowers that gradually deepen, image 92
Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 62
Knotweed (Persicaria Affinis 'Superba') — spreading groundcover that adds an eclectic charm to any garden scape; pink flowers that gradually deepen, image 113
Knotweed (Persicaria Affinis 'Superba') — Ideal for borders or slopes; elliptical leaves turn bronzy-green in fall, image 91
Knotweed (Persicaria Affinis 'Superba') — pink flowers that gradually deepen to a rich crimson as summer progresses into fall, image 53
Knotweed (Persicaria Affinis 'Superba') — This low-maintenance ground cover thrives in Zones 4-9
Knotweed (Persicaria Affinis 'Superba') — With a height of 8-12 inches and a spread of 18-24 inches; it is a delightful choice for gardeners, image 45
Knotweed (Persicaria Affinis 'Superba') — elliptical leaves turn bronzy-green in fall, image 46
Knotweed (Persicaria Affinis 'Superba') — with the added interest of taking on a bronzed to verdant red palette as the temperatures drop
Knotweed (Persicaria Affinis 'Superba') — consider using it for borders; elliptical leaves turn bronzy-green in fall
Knotweed (Persicaria Affinis 'Superba') — preferring full sun to partial shade and moist
Knotweed (Persicaria Affinis 'Superba') — One of the key features of the Knotweed is its dense clusters of tiny; elliptical leaves turn, image 73
Knotweed (Persicaria Affinis 'Superba') — This low-maintenance ground cover thrives in Zones 4-9; pink flowers that gradually deepen to a rich, image 89
Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial with pink and red blooms; pink flowers that gradually deepen to a rich crimson, image 83
Knotweed (Persicaria Affinis 'Superba') — elliptical leaves turn bronzy-green in fall, image 88
Knotweed (Persicaria Affinis 'Superba') — ground cover / perennial for full or half; it is a delightful choice for gardeners looking for a, image 84
Knotweed (Persicaria Affinis 'Superba') — Persicaria affinis 'Superba', also known as knotweed, is a robust, mat-forming perennial; elliptical leaves turn
Knotweed (Persicaria Affinis 'Superba') — This low-maintenance ground cover thrives in Zones 4-9; pink flowers that gradually deepen to a rich, image 110
Knotweed (Persicaria Affinis 'Superba') — It features dense spikes of tiny pink flowers that deepen to red, blooming from mid-summer to fall; pink, image 86
Knotweed (Persicaria Affinis 'Superba') — It features dense spikes of tiny pink flowers that deepen to red, blooming from mid-summer to fall; pink, image 44
Knotweed (Persicaria Affinis 'Superba') — with the added interest of taking on a bronzed to verdant red palette as the temperatures drop, image 55
Knotweed (Persicaria Affinis 'Superba') — Persicaria affinis 'Superba', also known as knotweed, is a robust, mat-forming perennial
Photographs by 8 contributors

Related plants

Abiqua Drinking Gourd Hosta (Hosta 'Abiqua Drinking Gourd') — resembling a drinking gourd

Ground cover

Abiqua Drinking Gourd Hosta

Hosta 'Abiqua Drinking Gourd'

Deep ShadeUSDA 3–9
'Above the Clouds' Hosta (Hosta hybrid) — The Hosta hybrid 'Above the Clouds' is a large mounded perennial with cloudy blue

'Above the Clouds' Hosta

Hosta hybrid

'Affair to Remember' Hosta (Hosta hybrid) — and a feathered green overlay

'Affair to Remember' Hosta

Hosta hybrid

Alabama Jubilee Daylily (Hemerocallis 'Alabama Jubilee') — Each blossom spans approximately 7 inches across and adorns the plant from early to mid-summer

Perennial

Alabama Jubilee Daylily

Hemerocallis 'Alabama Jubilee'

FullUSDA 5–11
Albomarginata Hosta (Hosta 'Undulata Albo-Marginata') — it blooms with delicate pale lavender flowers

Perennial

Albomarginata Hosta

Hosta 'Undulata Albo-Marginata'

HalfUSDA 3–9
'All the Buzz' Ornamental Onion (Allium hybrid) — All the Buzz Ornamental Onion

'All the Buzz' Ornamental Onion

Allium hybrid