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Blue Ash

Fraxinus quadrangulata

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Blue Ash (Fraxinus quadrangulata) at Connon Nurseries

Blue Ash

Blue Ash

(Photo courtesy of NetPS Plant Finder)

Height:  50 feet

Spread:  40 feet

Sunlight:  full sun 

Hardiness Zone:  4a


A pretty native tree that's not commonly found in commerce, but worthy of use as an effective shade tree; highly adaptable to varying soil types and drought; name comes from blue exudate under the bark

Ornamental Features

Blue Ash has dark green deciduous foliage on a tree with an oval habit of growth. The glossy compound leaves turn yellow in fall.

Landscape Attributes

Blue Ash is a deciduous tree with a shapely oval form. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

This tree will require occasional maintenance and upkeep, and should only be pruned in summer after the leaves have fully developed, as it may 'bleed' sap if pruned in late winter or early spring. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Insects

Blue Ash is recommended for the following landscape applications;

  • Shade

Planting & Growing

Blue Ash will grow to be about 50 feet tall at maturity, with a spread of 40 feet. It has a high canopy with a typical clearance of 7 feet from the ground, and should not be planted underneath power lines. As it matures, the lower branches of this tree can be strategically removed to create a high enough canopy to support unobstructed human traffic underneath. It grows at a medium rate, and under ideal conditions can be expected to live for 70 years or more.

This tree should only be grown in full sunlight. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil type or pH, and is able to handle environmental salt. It is somewhat tolerant of urban pollution. This species is native to parts of North America.

Hardiness Zone Plant Height Minimum Sunlight
Ornamental Features