Skip to main content
A picture of a Lesser Knotweed

Lesser Knotweed

Koenigia campanulata

Also known as

Polygonum campanulatum

Photo by Jerry Cooper (CC BY 4.0)

Full Sun
Frequent watering
Frost Hardy

H7

RHS hardiness

-20°C

Minimum temperature

Expected size

Height
Spread

1m

Max

1m

50cm

Min

50cm

5 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Lesser Knotweed

A close up of some flowers on a Koenigia campanulata plant
Some white and pink flowers on a Koenigia campanulata plant

Lesser Knotweed Overview

Koenigia campanulata was previously well known as Persicaria campanulata and commonly called Lesser Knotweed. This perennial plant produces oval-shaped leaves with attractive veins, coloured whitish, developing to a pale brown shade. Flowers are small and bell-shaped, coloured pale pink.

How to propagate Lesser Knotweed

Division

Special features of Lesser Knotweed

Attractive flowers

Other uses of Lesser Knotweed

Grown for attractive foliage and flowers and suitable for bog gardens, moist borders and, shady areas by streams or ponds.