Water American Thorowax regularly, especially during dry spells, ensuring the soil is consistently moist but not waterlogged.

Reduce watering in winter, allowing the top few centimeters of soil to dry out between waterings. Good drainage is crucial to prevent root rot.

Prune American Thorowax in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing stems to maintain a tidy shape and encourage vigorous growth.

Deadheading spent flowers can prevent self-seeding and prolong the blooming period.

Propagate American Thorowax by sowing seeds in spring or autumn. Seeds can be sown directly into the garden or started indoors a few weeks prior.

Division of established clumps in spring is another effective method for propagation.

Repotting is generally not required for American Thorowax as it prefers to be undisturbed once established.

If container-grown, repot every 2-3 years in spring into a slightly larger pot with fresh, well-draining potting mix. Ensure the new pot has adequate drainage holes.