How to Prune Aster amellus 'Blue King'?
Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn

Aster amellus 'Blue King' · Aster amellus 'Blue King'
Grow in well-drained, moderately fertile soil in an open, sunny position. See aster cultivation
Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn