Water Polygonum achoreum regularly during the growing season, ensuring the soil remains consistently moist but not waterlogged.

Reduce watering in autumn and winter, allowing the soil to dry out slightly between waterings. Overwatering can lead to root rot.

Prune Polygonum achoreum in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing stems. This encourages vigorous growth and maintains a tidy shape.

Light trimming can be done after flowering to encourage a second bloom, but heavy pruning is best done when dormant.

Polygonum achoreum can be propagated by division in early spring. Carefully dig up the plant and separate the root ball into smaller sections, ensuring each section has healthy roots and shoots.

Replant divisions immediately into well-draining soil. Stem cuttings can also be taken in summer.

Repot Polygonum achoreum every 2-3 years, or when it becomes root-bound. Choose a pot that is slightly larger than the current one. Use a well-draining potting mix.

Spring is the ideal time to repot, just as new growth begins to emerge. Ensure the plant is well-watered after repotting.