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. 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.
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 Estimated Reading Time: 5 mins. Bushes: Like trees, pruning bushes depends on the type of species; however, when in doubt always prune in the dormant season (winter).
For bushes without blooms (i.e. burning bush, boxwoods, barberry) prune these any time except in late autumn. Bushes pruned in late fall may not have enough time to harden off the pruning cuts before the first Estimated Reading Time: 5 mins. These shrubs are often used in mass plantings or as a hedge. The same pruning technique can be used if they are planted as a specimen. For these plants, pruning should be done in the early spring, before they leaf out.
Shear or prune the outer branch tips to shape and reduce the size of the plant. Repeat this pruning technique throughout the summer, as needed.