Barberry doesn't shear well, so prune individual branches back into the bush to encourage new growth to arch gracefully. Evergreen wintergreen barberry (Berberis julianae), hardy in U.S. Department of Agriculture plant hardiness zones 6 through 9a, may be pruned from late winter through early spring. 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.
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 shrublop.buzzted Reading Time: 5 mins. Formative pruning plan in the spring for a single-planted bush. If it is necessary to trim a hedge or curb, the procedure will be performed in 2 stages.
The first pruning is done in early June, and the second pruning is done until mid-August. Attention! Pruning prickly shrub barberry is carried out in the second year after planting, not earlier. 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.