Common Bistort

How to grow Common Bistort

Written by the GardenDecoded editorial team · Last reviewed 21 July 2026 · Written for UK gardens · How we research our guidance

Planting

Plant in autumn or spring in ground that stays damp — a pond margin, a low-lying border or clay that others struggle with. It will grow in drier soil but the leaves scorch and it flowers less. Allow room, as it makes a broad mat of foliage.

Pruning

Deadhead the spent pokers to encourage a further flush later in summer. Cut the whole plant back in late autumn once the foliage collapses.

Propagation

Divide in spring or autumn; the spreading rootstock separates easily and divisions establish quickly. Seed is possible but division is simpler and faster.

Pests and diseases

Usually trouble-free. Slugs may graze the young leaves without doing lasting damage.

Value to wildlife

The dense pink flower spikes are worked by bees and hoverflies over a long season, and the leaf mat gives ground-level cover in damp planting.

Notes

It spreads steadily by rhizome and can outgrow its space in soil it likes. Lift and reduce the clump every few years rather than letting it run into neighbours.

This guidance was researched and written by GardenDecoded — see our editorial policy for how guides are checked and reviewed.

Other names for this plant

These names have all been used for Persicaria bistorta but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.

Others in Persicaria