How to prune king george aster

Late autumn after frost, or early spring; deadhead throughout bloom. Remove spent flower heads as they fade. In late autumn or early spring, cut all stems to just above ground level. If dividing, lift in early spring and replant strong outer sections, discarding the woody centre.

Annual cutback; deadhead throughout bloom; divide every 4–5 years if needed. King George aster, a compact Aster amellus cultivar, needs minimal intervention compared to taller asters. Deadhead spent blooms to keep the display tidy. Cut stems down to ground level in late autumn or early spring. Division is rarely needed but can be done in spring every 4–5 years if vigour declines.

Remove spent flower heads as they fade. In late autumn or early spring, cut all stems to just above ground level. If dividing, lift in early spring and replant strong outer sections, discarding the woody centre.