Persicaria polymorpha
Knotweed
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Knotweed (Persicaria polymorpha) - Description
Persicaria polymorpha (knotweed) is a species of flowering plant in the buckwheat family, Polygonaceae.
Knotweed (Persicaria polymorpha) - Blooming
Small white or pink flowers.
Knotweed (Persicaria polymorpha) - Growth
Annuals, perennaisl, and some subshrubs. Very hearty plants that do well with full sun or partial shade. Can spread quickly and may become weedy. Exhibits nice fall color. The larger perennials work well in a border, or as a groundcover. Smaller species make nice additions to a rock garden.
Knotweed (Persicaria polymorpha) - Planting
Propagate from the seed. Sow in containers in cold frame in spring (for protection and to ensure hardiness). Conduct division in spring or fall.
Knotweed (Persicaria polymorpha) - Pest
Aphids, slugs, and snails.
Knotweed (Persicaria polymorpha) - Interesting facts
Persicaria is found across the globe. All plant parts may aggravate the skin upon contact. Consuming the sap will result in stomach discomfort.
Knotweed (Persicaria polymorpha) - Soil and irrigation
Generally needs regular water except for P. capitata, which needs no irrigation at all. Does best in any soil as long as it's kept moist.
