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Knotweed

Persicaria Affinis 'Superba'

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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

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

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Photos (116)

Knotweed (Persicaria Affinis 'Superba') — Persicaria affinis 'Superba', also known as knotweed, is a robust, mat-forming perennial; elliptical, image 85
Knotweed (Persicaria Affinis 'Superba') — When integrating Knotweed into a design; it is a delightful choice for gardeners looking for a groundcover that
Knotweed (Persicaria Affinis 'Superba') — elliptical leaves turn bronzy-green in fall, image 25
Knotweed (Persicaria Affinis 'Superba') — elliptical leaves turn bronzy-green in fall, image 109
Knotweed (Persicaria Affinis 'Superba') — This autumnal color transition creates a multi-seasonal display that enriches the garden's aesthetic; pink flowers
Knotweed (Persicaria Affinis 'Superba') — with the added interest of taking on a bronzed to verdant red palette as the temperatures drop; elliptical leaves
Knotweed (Persicaria Affinis 'Superba') — It is a delightful choice for gardeners looking for a groundcover that offers both beauty and practicality, image 81
Knotweed (Persicaria Affinis 'Superba') — making it versatile across many climates; it is a delightful choice for gardeners looking for a, image 93
Knotweed (Persicaria Affinis 'Superba') — When integrating Knotweed into a design; it is a delightful choice for gardeners looking for a, image 99
Knotweed (Persicaria Affinis 'Superba') — pink and red flowers in the garden; elliptical leaves turn bronzy-green in fall, image 82
Knotweed (Persicaria Affinis 'Superba') — This autumnal color transition creates a multi-seasonal display that enriches the garden's aesthetic, image 77
Knotweed (Persicaria Affinis 'Superba') — It features dense spikes of tiny pink flowers that deepen to red, blooming from mid-summer to fall
Knotweed (Persicaria Affinis 'Superba') — making it versatile across many climates; it is a delightful choice for gardeners looking for a, image 51
Knotweed (Persicaria Affinis 'Superba') — with the added interest of taking on a bronzed to verdant red palette as the temperatures drop, image 97
Knotweed (Persicaria Affinis 'Superba') — or as a stabilizing force on sloped terrains; pink flowers that gradually deepen to a rich crimson as, image 80
Knotweed (Persicaria Affinis 'Superba') — elliptical leaves turn bronzy-green in fall, image 67
Knotweed (Persicaria Affinis 'Superba') — consider using it for borders; elliptical leaves turn bronzy-green in fall, image 100
Knotweed (Persicaria Affinis 'Superba') — consider using it for borders
Knotweed (Persicaria Affinis 'Superba') — This autumnal color transition creates a multi-seasonal display that enriches the garden's aesthetic, image 98
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 66
Knotweed (Persicaria Affinis 'Superba') — or as a stabilizing force on sloped terrains; pink flowers that gradually deepen to a rich crimson as, image 101
Knotweed (Persicaria Affinis 'Superba') — It is a delightful choice for gardeners looking for a groundcover that offers both beauty and practicality, image 60
Knotweed (Persicaria Affinis 'Superba') — These blossoms are perched atop short stalks that rise modestly above the foliage; it is a delightful choice for
Knotweed (Persicaria Affinis 'Superba') — This low-maintenance ground cover thrives in Zones 4-9; pink flowers that gradually deepen to a rich crimson as
Photographs by 8 contributors

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