Culture
Best grown in moist, organically rich, well-drained loams in full sun. Best performance usually occurs in climates with cool summer temperatures. Avoid hot and dry conditions.
Noteworthy Characteristics
Fraxinus excelsior, commonly called European ash or common ash, is native to Europe and western Asia. It is a large, rounded, deciduous tree that grows to 70-80’ (less frequently to 140’) tall. It is a popular landscape tree in Europe, but has not been very popular in the U.S., in part because of its susceptibility to borers.
Genus name is the classical Latin name for ash trees.
Specific epithet comes from the Latin word excelsus meaning lofty or high.
'Pendula' is an old weeping form of Fraxinus excelsior that was discovered in a field in England in the middle of the 18th century and was popular in the Victorian era. It has a rounded or umbrella shape with branches that cascade down to the ground. Its flowers are insignificant but range in color from green to cream to purple. In fall its leaves may turn an attractive yellow but may also drop off while still green. It grows 10 to 25 ft. tall and 20 to 50 ft. wide.
Problems
Emerald ash borer is native to Asia. It was first discovered in the U. S. (southeastern Michigan) in 2002. It has now spread to a number of additional states in the northeast and upper Midwest, and is expected to continue spreading. Emerald ash borer will typically kill an ash tree within 3-5 years after infestation. Once infestation occurs, it is very difficult to eradicate this pest which feeds under the bark and bores into wood. This borer now constitutes a serious threat to all species of ash in North America. European ash trees are generally susceptible to a number of additional insect problems including ash borer, lilac borer, carpenter worm, oyster shell scale, leaf miners, fall webworms, ash sawflies and ash leaf curl aphid. Potential disease problems include fungal leaf spots, powdery mildew, rust, anthracnose, cankers and ash yellows. General ash decline is also a concern. Brittle branches are susceptible to damage from high winds and snow/ice.
Uses
Planting new European ash trees is no longer recommended given the susceptibility of this tree to the emerald ash borer. Ash trees have typically been used over time in a variety of applications including shade tree, street tree or lawn tree.