When barberry overgrows its space, trim branches to keep them away from car finishes and moving children. Barberry doesn't shear well, so prune individual branches back into the bush to encourage new growth to arch gracefully. 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.
When to Prune Barberry Shrubs? Pruning the barberry bushes yearly is important to aid in better growth and blooming. They produce fruits or berries that create seedlings. It is recommended that you prune the shrubs after they have fruited, during fall or treeclearance.buzzted Reading Time: 5 mins. Sep 26, Barberry do not require pruning, however respond very well to it. I leave mine alone indefinitely except to remove a damaged, dead or stray branch that is spoiling the look or shape of the plant.
That said, Barberry can be pruned or sheared to maintain a formal shape or hedge, to tidy up the plant, or to reduce size.