Agastache rugosa prefers consistently moist soil during its growing season but can tolerate some dryness once established. Water thoroughly when the top 2-3 cm of soil feels dry.

Avoid waterlogging, as this can lead to root rot, especially in cooler, wetter conditions. Reduce watering in winter.

Prune Agastache rugosa back by about one-third after the first flush of flowers to encourage a second bloom and maintain a tidy shape. Cut back dead or spent flower stalks in late autumn or early spring to prevent self-seeding if desired and to tidy up the plant for winter.

Agastache rugosa is easily propagated from seed sown in early spring, either indoors or directly outdoors after the last frost. It can also be propagated by division of established clumps in spring or autumn.

Softwood cuttings can be taken in late spring or early summer.

Agastache rugosa is typically grown in the ground or in containers. If grown in containers, repotting is generally needed every 2-3 years in spring to refresh the soil and provide more space.

Choose a pot with good drainage and use a well-draining potting mix.