Pruning guide
How to prune smooth blue aster
More smooth blue aster care
Pruning smooth blue aster — FAQ
When should I prune smooth blue aster?
Late spring (before mid-June) for pinching; after first frost for cutting back. Shear or pinch stems by one-third in late spring to promote branching. Deadhead spent flower clusters to extend display. Cut all stems to 2–3 inches above the crown after frost.
How often does smooth blue aster need pruning?
Annually — one mid-season pinch, one autumn cut-back. Smooth Blue Aster has a tidier, more upright habit than many asters but still benefits from a mid-season pinch. Cut stems back by about one-third in late spring or early June to encourage compact, bushy growth and heavier flowering. After frost, cut stems to the ground to tidy the plant for winter.
How do you prune smooth blue aster?
Shear or pinch stems by one-third in late spring to promote branching. Deadhead spent flower clusters to extend display. Cut all stems to 2–3 inches above the crown after frost.