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White Ash

Fraxinus americana • American ash


The white ash is our largest native ash species in Ontario as it can grow up to 30 meters tall. It is native to North America and is a common species in Ontario’s deciduous forests, throughout southern Ontario north to Lake Nipissing and Sault Ste. Marie. It can be found in rocky, deep, well drained soils. Populations have been impacted by Emerald Ash Borer, causing significant declines in numbers.  The tough, shock-resistant wood used has been previously used for hockey sticks, baseball bats and tennis rackets.



Compound and pinnately divided into 5-7 leaflets. Leaves dark green and paler underneath, mostly hairless. Leaves are oblong. Leaves yellow or bronze-purple in fall. No serrations present.


Pale green to yellowish, winged nutlets (samaras). Long wing encloses the upper 1/3 of each seedcase. Hang in long clusters.


Mature bark greyish with ridges that form diamond patterns on bark.


Purplish to yellow. Male and female flowers on separate trees. Petals absent. Flowers in May.

186 Trees

Heritage Tree

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  • Heritage Tree No. {{property.recognition_number}}
  • Age: {{property.tree_age}} years
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