GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on November 18, 2019
Canadian hemlocks are tolerant of shearing to maintain a size. Don't remove more than 25% of the branch, or of the entire foliage in a one year period, is the rule of thumb for best management practices in pruning.
https://www.gardeningknowhow.com/ornamental/trees/hemlock/canadian-hemlock-care.htm
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