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Why Now Is the Time to Prune Your Elm Trees in Calgary

If you have elm trees on your property in Calgary, proper pruning is essential for their long-term health, safety, and appearance. But did you know there’s a specific time of year when elm pruning is actually regulated by law? In Alberta, elm pruning is strictly prohibited from April 1 to September 30 under provincial regulations designed to prevent the spread of Dutch Elm Disease (DED). Booking your pruning service during the allowed window — October 1 to March 31 — helps protect your trees and ensures you remain in compliance with these laws.

Why the Seasonal Restriction Exists

Dutch Elm Disease (DED) is a devastating fungal infection spread by elm bark beetles. These beetles are active during the spring and summer months and are attracted to the scent of fresh pruning cuts. Pruning elms during this time can draw beetles to your tree and greatly increase the risk of infection. By pruning in the fall and winter months — when the beetles are inactive — you significantly reduce the risk of disease and help protect Calgary’s elm population.

Why Professional Pruning Matters

Elm trees are large, mature trees that require expert care. Proper pruning not only improves the tree’s structure and appearance but also reduces hazards such as broken or weak branches. At Prune It Up, our ISA Certified Arborists are trained and experienced in pruning elm trees safely, correctly, and in compliance with provincial guidelines.

Don’t Wait — The Season Is Short and Fills Up Fast

The elm pruning season in Calgary is limited, and appointments fill up quickly. If your elm tree has overgrown branches, deadwood, or needs shaping, now is the time to book your service. Waiting too long could mean missing the window entirely and having to delay until next season.