Persicaria amphibia thrives in consistently moist to wet conditions. For terrestrial plants, water deeply and regularly, allowing the soil to dry slightly between waterings.

For aquatic setups, maintain a water depth of 10-30 cm. Avoid letting the soil completely dry out at any stage.

Pruning is primarily for aesthetic control and to manage spread. Trim back overgrown stems to maintain desired shape and size. Deadhead spent flower spikes to encourage further blooming.

Prune in late spring or early summer as needed to prevent overcrowding and maintain vigorous growth.

Persicaria amphibia is easily propagated by stem cuttings or division. Take 10-15 cm stem cuttings in spring or summer and root them in water or moist soil.

Established plants can be divided in early spring, ensuring each division has roots and several shoots for successful transplanting.

Repotting is generally only necessary for container-grown terrestrial plants that have become root-bound. This is best done in early spring before new growth begins.

Use a large pot with a diameter at least 10 cm wider than the current one and fresh, nutrient-rich potting mix.