Water Adenostyles alliariae regularly, especially during dry spells, ensuring the soil remains consistently moist but not waterlogged. Reduce watering in winter when the plant is dormant to prevent root rot.

Aim for even moisture levels throughout the growing season for optimal health and growth.

Prune Adenostyles alliariae after flowering in late summer or early autumn. Remove spent flower stalks and any dead or damaged foliage.

This tidies the plant and encourages a more compact growth habit for the following season. Minimal pruning is generally required.

Adenostyles alliariae can be propagated by division in early spring or autumn. Carefully dig up the plant and divide the root ball into sections, ensuring each section has healthy roots and shoots.

Replant immediately in well-prepared soil and water thoroughly.

Repot mature plants every 2-3 years, or when they become root-bound. The best time to repot is in early spring before new growth begins. Use a larger pot with fresh, well-draining potting mix.

Ensure the new pot has adequate drainage holes.