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A picture of a Polygonum

Polygonum

Polygonum spp.

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

Full Sun
Moderate watering
Tender

10b

USDA zone

2°C

Minimum temperature

Expected size

Height
Spread

Max

Min

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Polygonum

A photo of Polygonum
A photo of Polygonum
A photo of Polygonum
A photo of Polygonum
A photo of Polygonum

Polygonum 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 Polygonum

Cuttings

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

Division

Seed

Other uses of Polygonum

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