A picture of a Knotweed

Knotweed

Polygonum spp.

Also known as

Russian vine, Smartweed, Fleece vine, Silver lace vine, Persicaria

Polygonum persicaria by French Wikipedia (CC-BY-SA-3.0)

Full Sun
Moderate watering
Tender

H2

RHS hardiness

1°C

Minimum temperature

Expected size

Height
Spread

Max

Min

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Knotweed

A photo of Knotweed
A photo of Knotweed
A photo of Knotweed
A photo of Knotweed
A photo of Knotweed

Knotweed Overview

Genus with approximately 217 diverse species also frequently called knotweed and knotgrass. They are found across Northern temperate climates in a wide range of habitats and species include annuals, perennials, woody vines and some aquatic floating species. Small pink or white flowers are produced on vertical spikes and stems are frequently red coloured or reck-speckled.

How to propagate Knotweed

Cuttings

Seed or division in autumn or spring, climbers only by semi-ripe cuttings in summer.

Division

Seed

Other uses of Knotweed

Can be used for ground cover, edging or rock gardens. Suitable for coastal conditions. Attracts butterflies.