Tie nonproductive branches together and cut the old clump down to the ground with a long-handled lopper. On deciduous varieties, tie target branches before leaves drop. When shrubs grow too big to manage, tie up branches and prune all clumps down to 1 inch tall. Barberry will regrow 1 to 2. They produce fruits or berries that create seedlings. It is recommended that you prune the shrubs after they have fruited, during fall or winter.
Dead woods should be removed during summer months, and the bushes should be pruned in the period between mid winter to late winters, i.e., before stumpcutting.buzzted Reading Time: 5 mins. Its flowers are also yellow, and appear in spring. This barberry grows slowly and stops at about 12 inches tall, but exceeds that in width. If it gets untidy, trim it into shape after it flowers.
Sep 21, Use hand-held or electric hedge clippers to shape the plant. For healthy, full growth from top to base, always trim barberry shrubs wider at the base of the plant.
This method opens up the lower branches of the shrub to encourage new growth for filling in gaps. Collect all branches, leaves and spines and dispose of these in yard waste bags.