Answer: When overgrown shrubs need renovation, it is best to do it over a two or three year period. If you prune back severely in one season, the plant can be stressed enough to die. You can safely remove one-third of the live material in any one pruning session. You can prune now or next month, but don't wait until too late in the season - pruning encourages new growth and if pruned too late in the season, before the new growth has a chance to harden off, cold weather will kill it back. Best wishes with your new landscape!
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