Tordylium maximum prefers consistently moist soil but can tolerate some dryness once established. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogging, as this can lead to root rot.

Reduce watering frequency during winter months when the plant's growth slows.

Pruning is typically not essential for Tordylium maximum. Deadheading spent flowers can prevent self-seeding if desired and encourage a tidier appearance.

If the plant becomes leggy, it can be cut back by one-third in late spring to promote bushier growth.

Tordylium maximum is easily propagated by seeds sown directly outdoors in autumn or early spring. Seeds may require a period of cold stratification.

It can also be propagated by division of established clumps in early spring before new growth appears.

Repotting is generally not necessary for Tordylium maximum as it is often grown as an annual or biennial.

If grown in a container and it becomes root-bound, repot in spring into a slightly larger pot with fresh potting mix. Ensure good drainage.