Eutrochium fistulosum thrives in consistently moist soil. Water deeply when the top 2-3 cm of soil feels dry.

Avoid allowing the soil to completely dry out, especially during hot weather or when the plant is establishing. Good drainage is still important to prevent root rot.

Cut back stems in late fall or early spring to about 15-20 cm above the ground. This prevents self-seeding and encourages a more compact growth habit.

Remove any dead or damaged stems at any time of year to maintain plant health and appearance.

Propagate by division in early spring or fall. Carefully dig up the clump and divide it into sections, ensuring each section has roots and shoots.

Alternatively, collect seeds in fall, stratify them over winter, and sow in spring.

Repotting is generally not required for established garden plants as they are herbaceous perennials. If growing in a container, repot every 2-3 years in spring to refresh the soil and provide more space for root growth, typically into a slightly larger pot.