Is it too late to prune my mature cedar hedge?

(Question)

We didn’t do it earlier in the year and my garden helper really wants to do it now. But I am worried that it might be too late.

(Answer)

If you do it right away, you should be fine. It’s best to finish pruning about 6 weeks before freeze up and her in Toronto, our first hard frost is around the end of October.

However, there’s always a chance it might be earlier, and there is no harm in leaving the pruning until the spring.

Here is a link to a Toronto Master Gardener Guide on Evergreens Suitable for Hedging, including information about pruning:

https://www.torontomastergardeners.ca/index.php/factsheet/evergreens-suitable-for-hedging-a-toronto-master-gardeners-guide/

and here is a link to Mark Cullen’s Gardenblog entry on pruning cedar hedges:

https://mark-cullen.blogspot.ca/2010/09/cedar-hedges-investment-that-grows.html