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Q.When do I prune arborvitae hedge?

Zone 7 | robinholly added on September 8, 2015 | Answered

We have a hedgerow of 28 emerald green arborvitae and need to keep them at 6-7′ in height to stay within the by-laws of our HOA. Should I begin topping the trees now or wait until they have reached their desired height? They are all approximately 4-5′ tall now and seem to grow about 9-12″ per season. They are planted 24″ apart but are not yet touching. The photo was taken within the last week. Thanks!

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