How to prune smooth hydrangea 'incrediball'

Late winter to early spring, just as buds begin to swell (February–March). Cut stems back to 12–18 inches from the ground (about one-third overall). Make clean angled cuts just above an outward-facing bud or node to encourage an open, sturdy framework.

Annually. Yes — prune every year in late winter for best results. Incrediball blooms on new wood, so you cannot cut buds off by pruning in early spring. Cut stems back fairly hard to prevent the heavy flower heads from flopping on weak stems. This is one of the most beginner-friendly hydrangeas to prune.

Cut stems back to 12–18 inches from the ground (about one-third overall). Make clean angled cuts just above an outward-facing bud or node to encourage an open, sturdy framework.