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 Cavity
Deadwood
 Split Trunk  Cavity
 Cavities, frost cracks, splits and sunscald are some of the signs
of a declining mayday tree becoming a hazard.

More than 50 years ago maydays (Prunus padus) were planted as boulevard trees in many areas of the city.  This species was chosen because it was considered to be one of the few ornamental trees that could cope with the short growing season and hard winters.  Most mayday trees growing in an urban environment decline rapidly after thirty years of age.  In fact, dieback may begin in as little as twenty years.

Visible signs of dieback due to age include:

  • Death of branches at the top of tree
  • Small shoots (suckers and watersprouts) growing from the base of the tree (these are the tree’s response to stress)
  • Thinning of leaves or small leaves in upper part of the tree
  • Sunscald damage (peeling bark and large wounds on south facing side of trunk/branches)
  • Cracks, splits or cavities in the trunk or branches
  • Disease (black knot)
  • Insect damage
When a tree declines to this point, it creates a high degree of risk and safety hazard.  The only way to reduce the risk of potential injury or property damage is to remove the tree as per Bylaw C-504, Boulevard Trees.

As part of our Tree Renewal program, these maydays will be replaced with a new city boulevard tree.  If there is no planting conflict, a new tree will be planted in the fall. Planting conflicts include utility lines, existing trees, driveways, sight lines, etc.  Unfortunately, if a planting conflict exists that cannot be worked around, the tree will not be able to be replaced.  Homeowners will be advised of tree type and planting location before work commences.

Any questions or concerns that you may have regarding our Tree Renewal program can be directed to Parks Operations at 780-830-5018.

Trunk Rot
 Often the full extent of rot and hazard potential cannot be seen until the tree is removed.

Last updated: 4/13/2016 9:18:29 AM