Answer: Left unpruned, yews have a very graceful habit. The branches have a natural arch to them, giving the plant an overall soft appearance. If you prefer a more formal look, yews can be trimmed. Trim them in the early summer as the new growth fades from bright green to dark green. Yews often put out a second flush of growth in mid-season. To keep their neat appearance, they can also be pruned again in mid-August. With the exception of yews, evergreens should never be pruned back hard into bare wood. While we wouldn't advise any drastic pruning, yews are better about filling in a bare area than any other evergreen. Keep in mind whenever you prune, that yews are very slow growing.
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