How to Prune aster 'Starshine'?
Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn

aster 'Starshine' · Aster ageratoides 'Starshine'
Grow in moderately fertile, well-drained soil in full sun or light shade. See aster cultivation
Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn