Water regularly, especially during dry periods, to keep the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out slightly between waterings for established plants.

Reduce watering in fall as growth slows.

Deadhead spent flowers regularly to encourage continuous blooming and prevent self-seeding. In late fall or early spring, cut back dead or dying stems to about 10-15 cm from the ground.

This tidies the plant and removes overwintering pests.

Symphyotrichum puniceum can be propagated by division of established clumps in early spring or fall. Sow seeds collected in fall directly into a cold frame or stratified indoors and sown in spring.

Cuttings can also be taken from young shoots in late spring.

Established plants generally do not require frequent repotting, as they prefer to be undisturbed. If division is necessary, typically done every 3-5 years, repot the divisions into suitable soil in spring or fall, ensuring they are well-watered after transplanting.