Answer: You can renovate hollies but it's best to do it over a 2-3 year period. If you remove more than 1/3 of the healthy stems, branches and leaves, you'll stress the plant, making it susceptible to insect and disease problems. Plan on reducing the height gradually. The best time to prune is early spring, before new growth begins. If you prune later, you may be pruning off the flowers, which will reduce or eliminate berry development. If berries aren't a special concern, go ahead and prune now, taking off only 1/3 of the plant material.
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