News Flash


Posted on: January 6, 2020

Elm Tree Pruning Information


The only time it is legal to prune elms in Alberta is between October 1 and March 31. This is when the elm bark beetles, responsible for spreading the deadly DED fungus, are not active. Elm bark beetles feed on healthy elms and breed and overwinter in dead and dying elm trees. If elm trees are pruned between April 1 and September 30, beetles will be drawn to the scent of the fresh pruning cuts, potentially infecting an otherwise healthy elm.

Having your tree pruned properly is important - get your trees be pruned by a professional arborist such as an ISA Certified Arborist. 

For more information, call the STOPDED hotline at 1-877-837-ELMS or go to To find an ISA Certified Arborist, go to

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