Winterberry (Ilex verticillata) is the common name of a deciduous shrub, native to North America. The Ilex genus contains species that are commonly known as hollies. Winterberry grows to a height of 6 to 10 feet with an almost-equal spread. Winterberry's flowers are inconspicuous but they give way to brilliant red berries in the winter. The fruit resembles that of the familiar Christmas holly (Ilex opaca), but the leaves are not as deeply serrated. Although winterberry requires little pruning, late winter and early spring are the best times to do so.
Remove any diseased or damaged shoots by cutting them back to a main branch.
Remove any growth that is not in keeping with the desired shape of the winterberry shrub. Snip shoots back to the length or height desired.
Rake up all pruning debris and bag it. Lay down a fresh 3-inch layer of mulch, 2 inches from the base of the shrub and spread it 1 foot past the dripline.