- sharp pruners
Step 1: Cut Stems
As soon as this shrub has finished flowering, cut back about a quarter of the oldest flowering stems to 6 inches (15 cm) above the ground.
Step 2: Remove Dead Stems
First remove any dead, damaged, or diseased stems, cutting them back to the base of the plant using sharp, clean pruners.
Step 3: Prune Old Growth
Prune out stems of the previous year's growth, cutting them back to about 2 or 4 buds from the old wood. This will encourage a new flush of growth.
Step 4: Trim Tips
Finally, trim the tips of any strong young stems that are already present in the plant. This encourages them to branch further down, resulting in more flowers.
Follow these steps to prune shrubs that flower before midsummer.