Polygonum alpestre prefers consistent moisture, especially during its active growth period. Water regularly when the top inch of soil feels dry. Avoid waterlogging, as this can lead to root rot.

Reduce watering slightly in cooler months but do not allow the soil to dry out completely.

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

Deadheading spent flower stalks in autumn can prevent self-seeding if desired.

Polygonum alpestre can be propagated by division of established clumps in early spring. Carefully dig up the plant and divide the root ball into sections, ensuring each section has roots and shoots.

Replant divisions immediately into well-prepared soil. It can also be grown from seed sown in autumn.

Repot Polygonum alpestre every 2-3 years or when the plant becomes root-bound. Early spring, before new growth begins, is the ideal time.

Choose a pot one size larger than the current one, using a well-draining potting mix. Ensure adequate drainage holes in the pot.