Water regularly during the growing season, especially in dry spells. Allow the soil to dry slightly between waterings. Reduce watering in fall and winter.

Ensure good drainage to prevent waterlogging, which can lead to root rot. Overwatering is a common mistake.

Prune in early spring to shape the plant and remove any dead or damaged stems from the previous year. Deadheading spent flowers throughout the summer can encourage more blooms and prevent excessive self-seeding.

Cut back the plant in late autumn after it has finished flowering.

Easily propagated from seed sown in spring, either directly outdoors or indoors a few weeks prior. It also readily self-seeds. Stem cuttings can be taken in late spring or early summer and rooted in moist soil or water.

As Leonurus cardiaca is often grown as an herbaceous perennial or annual, frequent repotting is not usually necessary.

If grown in containers, repot in spring every 1-2 years into a slightly larger pot with fresh potting mix if root-bound. Ensure the new pot has adequate drainage.