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
Seed or division in autumn or spring, climbers only by semi-ripe cuttings in summer.
Other uses of Polygonum
Can be used for ground cover, edging or rock gardens. Suitable for coastal conditions. Attracts butterflies.