SelecTree: Tree Detail

BLUE ASH
Fraxinus quadrangulata

Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata Fraxinus quadrangulata

Photo Locations: Morton Arboretum - Lisle, IL and The National Arboretum - Washington, DC

General Notes

Hardy at high elevations. Prolific seed producer. Large compound leaves with 7 - 11 leaflets, each up to 5 inches long. Twigs are square with 4 corky ridges.

Native to Central United States.

Trees may be referred to as male or female.

A Fraxinus quadrangulata in Santa Ana is registered as a California Big Tree. It measures 79 feet high, with a trunk circumference of 222 inches and a crown spread of 70 feet.

Family: Oleaceae

Tree Characteristics

Erect or Spreading and requires ample growing space.

Oval or Rounded Shape.

Has Deciduous foliage.

Height: 50 - 75 feet.

Width: 35 - 60 feet.

Growth Rate: 36 Inches per Year.

Longevity 50 to 150 years or more.

Leaves Pinnately Compound Odd, Dark Green, Bronze, Gold, Purple or Multicolored, Deciduous.

Flowers Inconspicuous. Flowers in Spring. Has either male or female flowers (dioecious). Trees may be sold as male or female.

Prolific, Beige, Brown, Yellow or Mostly Green Winged Seed, Very Small to Large (Under 0.25 - 3.00 inches), fruiting in Summer or Fall.

Bark Dark Gray or Light Gray, Furrowed or Scaly.

Shading Capacity Rated as Moderate in Leaf.

Shading Capacity Rated as Moderate out of Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 2 - 6.

USDA Hardiness Zones 4 - 7.

Exposure Full Sun to Partial Shade.

Wet to Moist Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Not Suited.

Pests & Disease Information

Susceptible to Beetle Borers and Scales, Root Rot, Sooty Mold and Verticillium.

Health, Safety & Environmental Concerns

Branch Strength Rated as Medium.

Root Damage Potential Rated as Low.

Allergy Health Hazard.

Fire Resistance is Favorable.

Desirable Wildlife Plant.

Not Deer Palatable.

Cite this tree:
SelecTree. "Fraxinus quadrangulata Tree Record." 1995-2017. Nov 24, 2017.
< http://selectree.calpoly.edu/tree-detail/fraxinus-quadrangulata >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.