Tree health is important to maintain St. Albert’s urban forest and the benefits that come with a large urban tree canopy. Part of the city’s canopy includes 26,000 ash trees.

As of summer 2020, these trees have been impacted by ash plant bug (Tropidosteptes spp). Ash plant bugs feed on leaves leaving holes or discolored sections; however, damage is rarely severe enough to cause defoliation or need intervention and control. Ash plant bugs are cyclical in nature and when the population has peaked, it will naturally start to reduce.