Sep 21, Make a degree cut close to the main trunk of the shrub. Do this removal first so you can judge the evenness of the plant when using the hedge clippers.
Decide which type of pruning the barberry requires.
Rejuvenation pruning involves removing 1/3 of the plant close to the center stem. 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. If you are forming a hedge, allow light to reach all areas of the hedge by leaving the base of the plants wider than the top.