Ash Trees Fraxinus

Ash Trees: A Field Guide

Ash trees are longtime favorites in landscapes where a grand statement is welcome. With their stately, handsome canopies and stalwart personalities, species of Fraxinus are widely planted throughout temperate zones of North America, Asia, and Europe.

“Of all the trees that grow so fair, Old England to adorn, Greater are none beneath the Sun, Than oak, and ash, and thorn,” noted Rudyard Kipling in a children’s book he wrote shortly before receiving the Nobel Prize for literature in 1907.

Even if you aren’t a “tree person,” you easily can recognize an ash tree by its seeds—papery pompoms that turn brown before the clusters scatter apart. In autumn, leaves of this deciduous tree can turn gorgeous shades of color (white ash trees are known for foliage that goes from “brilliant gold to a purplish maroon,” writes our contributor Jeanne Rostaing). See more in Gardening 101: White Ash Trees.

But be warned: a deadly pest called the emerald ash borer has  killed millions of trees nationwide since its discovery in Michigan in 2002. “If you are considering an ash tree for your property, it would be wise to first consult a tree expert for information on the iridescent half-inch-long Asian beetle that is devastating ash trees all over the United States,” writes Jeanne. Many tree specialists recommend planting an alternative tree such as Maple, Birch, or Oak.