Common Mugwort is quite drought-tolerant once established, but benefits from moderate watering, especially during prolonged dry spells or in its first year.

Water deeply when the top few centimeters of soil feel dry to the touch, typically once a week in average conditions. Avoid overwatering, as this can lead to root rot, particularly in heavy soils.

Ensure good drainage to prevent waterlogging.

Pruning is primarily done to manage its vigorous growth and prevent it from becoming invasive. Cut back stems in late autumn or early spring to about 15 cm from the ground to encourage bushier growth and control spread.

Deadheading spent flowers can prevent self-seeding, which is crucial for managing its spread. Regular cutting for culinary or medicinal use also serves as a form of pruning.

Common Mugwort is easily propagated by seeds, root division, or stem cuttings. Seeds can be sown directly outdoors in spring or autumn.

For root division, dig up established clumps in spring or autumn and separate the rhizomatous roots into smaller sections, ensuring each has some roots and shoots.

Stem cuttings can be taken in late spring or early summer and rooted in moist soil.

While typically grown outdoors, if cultivated in a pot to control its spread, repotting may be necessary every 1-2 years. Choose a pot only slightly larger than the previous one, ensuring it has good drainage holes.

Repot in early spring before new growth begins. Refresh the soil with a well-draining potting mix. This plant can quickly outgrow containers, so regular division might be more practical than continuous repotting.