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TREES & plants

European ash (Not recommended)

Summer foliage of European ash.

Due to susceptibility to emerald ash borer (EAB), European ash is not recommended for planting anywhere in this region and usually requires removal and/or replacement.  European ash is a large shade tree found throughout Europe which is hardy to the Midwest. Currently, ash trees cannot be sold in Illinois. Check with your state for quarantine restrictions.

Botanical name: 
Fraxinus excelsior
All Common Names: 
European ash, common ash
Family (English): 
Olive
Family (Botanic): 
Oleaceae
Tree or Plant Type: 
  • Tree
Foliage: 
  • Deciduous (seasonally loses leaves)
Native Locale: 
  • Non-native
Size Range: 
  • Large tree (more than 40 feet)
Mature Height: 
60-80 feet
Mature Width: 
60-90 feet
Light Exposure: 
  • Full sun (6 hrs direct light daily)
Hardiness Zones: 
  • Zone 5 (Chicago), 
  • Zone 6, 
  • Zone 7, 
  • Zone 8
Soil Preference: 
  • Moist, well-drained soil
Acid Soils: 
  • Tolerant
Alkaline Soils: 
  • Tolerant
Salt Spray: 
  • Tolerant
Soil Salt: 
  • Intolerant
Drought Conditions: 
  • Moderately Tolerant
Poor Drainage: 
  • Tolerant
Ornamental Interest: 
  • Fall color, 
  • Persistent fruit/seeds
Season of Interest: 
  • Early fall
Flower Color & Fragrance: 
  • Inconspicuous
Shape or Form: 
  • Round
Growth Rate: 
  • Moderate
Transplants Well: 
  • Yes
Wildlife: 
  • Insect pollinators, 
  • Migrant birds
More Information: 

Tree & Plant Care

Full sun and moist, well-drained soils.

Disease, pests, and problems
Susceptibility to the emerald ash borer makes this tree unsuitable for the landscape.

This species is also very susceptible to attack from the native ash borer.

Native geographic location and habitat

Native to Europe and Asia.

Bark color and texture 

The bark is light gray and relatively smooth on young trees, becoming tightly ridged and furrowed on older trees.

Leaf or needle arrangement, size, shape, and texture

Compound leaves are in pairs (opposite), with 7 to 11 leaflets on each leaf.
Leaves are dark green in summer, changing to yellow green or a mild yellow in fall.

Flower arrangement, shape, and size

Not ornamentally important.  Male and female flowers may be on same tree or on different trees.
Flowers appear in spring.

Fruit, cone, nut, and seed descriptions

Fruits are winged seeds borne in clusters.

 

 

Fraxinus excelsior or European ash (Not recommended)