Water regularly to keep the soil consistently moist, especially during dry periods. Avoid waterlogging, as Galeopsis pubescens prefers well-drained conditions.

Allow the top inch of soil to dry out slightly between waterings for optimal health.

Prune lightly after flowering to encourage bushier growth and prevent excessive self-seeding. Remove any dead or straggly stems to maintain an attractive appearance and promote plant vigor.

This also helps manage its spread.

Propagate by seed sown directly outdoors in spring or autumn. It can also be propagated by cuttings taken in late spring or early summer. Division of established clumps is another effective method.

Repotting is typically not necessary for this annual or short-lived perennial. If grown in containers, repot in spring if the plant becomes root-bound, using a well-draining potting mix.

Otherwise, it often self-seeds readily.