blue ash - fraxinus quadrangulata
Common Name: blue ash
Hardiness Zone: 4 to 7
Height: 50 to 75 ft
Width: 35 to 60 ft
Of the ash in Minnesota, the blue ash is the easiest to identify due to the square growth pattern of the branches. The foliage of the blue ash turns from a dark green to a pale yellow in the fall. Due to the emerald ash borer's spread across Minnesota it is not advised to plant this species of ash.