When do I prune arborvitae hedge?

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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1 Comment To "When do I prune arborvitae hedge?"

#1 Comment By Downtoearthdigs On 09/10/2015 @ 12:08 am

Here is some links that will help you.

https://extension.unh.edu/resources/files/Resource000594_Rep616.pdf ^[1]
https://www.gardeningknowhow.com/ornamental/trees/arborvitae/growing-arborvitae-trees.htm ^[2]

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URLs in this post:

[1] https://extension.unh.edu/resources/files/Resource000594_Rep616.pdf: https://extension.unh.edu/resources/files/Resource000594_Rep616.pdf

[2] https://www.gardeningknowhow.com/ornamental/trees/arborvitae/growing-arborvitae-trees.htm: https://www.gardeningknowhow.com/ornamental/trees/arborvitae/growing-arborvitae-trees.htm

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