How to Prune Symphyotrichum puniceum?
Cut stems close to the ground in late autumn

Symphyotrichum puniceum · Symphyotrichum puniceum
Grow in moderately fertile, moist but well-drained soil in full sun or light shade. Stake tall plants in early spring, see staking perennials. See aster cultivation for further advice
Cut stems close to the ground in late autumn