Japanese holly, a evergreen shrub with thick dark green foliage, is often pruned into a hedge when planted in a row. The Japanese holly is hardy through USDA zones 6 to 9,and it can grow to about 10 feet in height with a spread of 8 feet. While they are slow-growing, Japanese holly do have to be pruned lightly to be kept in the shape you want them.
Remove any dead, damaged or diseased wood from the Japanese holly plant. Cut the foliage off at the base of the plant.
Trim off any branches that are crossing or rubbing against each other at the base of the Japanese holly.
Prune back any over reaching foliage to keep the shrub or hedge looking neat. Cut all the foliage of this nature back to the base of the Japanese holly.