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Blue Ash

Fraxinus quadrangulata


The blue ash is a medium sized tree that usually grows 15-20 meters tall. It is native to North America however in Ontario in only grows in isolated communities, including in southwestern Ontario near Lake Erie. It is often found in deciduous floodplains, along sandy beaches and on limestone outcrops. The blue ash is a rare species and is considered at risk, forest removal and the emerald ash borer are major threats to blue ash.


Composed of 5-11 leaflets, 20-40 cm long, coarsely toothed with an asymmetrical base


Green to yellow, long, single-winged fruit.


Scaly bark that has more fissures with age. Inner bark turns blue when exposed.


Tiny, purplish flower with no petals. Many flowered clusters in early spring.

186 Trees

Heritage Tree

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  • Heritage Tree No. {{property.recognition_number}}
  • Age: {{property.tree_age}} years
  • Height: {{property.tree_height}} metres
  • Circumference: {{property.tree_circumference}} centimetres