Pruning guide
How to prune calico aster
More calico aster care
Pruning calico aster — FAQ
When should I prune calico aster?
Early summer for shaping; post-frost for cutting back. Shear back by one-quarter in early summer for a tighter clump. After frost, cut all stems down to 2–3 inches above the crown. Allow some seed heads to stand for wildlife and self-seeding.
How often does calico aster need pruning?
Annually — optional early-summer shear, one autumn cut-back. Calico Aster is a naturally sprawling, multi-branched plant that produces masses of tiny white flowers. Pruning is optional but a light shear in early summer tightens the habit. Deadheading has minimal impact given the volume of blooms. Cut stems to the ground after frost; this plant self-seeds readily so leave some spent heads if propagation is desired.
How do you prune calico aster?
Shear back by one-quarter in early summer for a tighter clump. After frost, cut all stems down to 2–3 inches above the crown. Allow some seed heads to stand for wildlife and self-seeding.