A hardy, native, drought and alkali resistant medium to large
tree. Since the onset of Dutch elm disease, Green Ash has been
over-planted in urban and conservation settings as a replacement
for American Elm. The largest tree in North Dakota is 69 feet tall
with a canopy spread of 74 feet.
Leaves and Buds
Bud Arrangement – Opposite.
Bud Color – Terminal buds are scaly, dark rusty-brown, and
Bud Size – 1/8 to 1/4 inch.
Leaf Type and Shape – Pinnate compound, 5 to 9 stalked leaflets.
Leaf Margins – Sharply-serrate to finely-toothed.
Leaf Surface – A few hairs along main veins below or occasionally
pubescent below, glabrous or pubescent twigs and petioles.
Leaf Length – 10 to 12 inches; leaflets 3 to 4 inches.
Leaf Width – 5 to 7 inches; leaflets 1 to 2 inches.
Leaf Color – Bright green on both surfaces, sometimes paler
below. Clear yellow fall color, with early leaf drop.
Flowers and Fruits
Flower Type – Dioecious, unisexual flowers are produced in large,
dense clusters, hairy; anthers are linear-oblong, on short
Flower Color – Greenish-yellow.
Fruit Type – Samara, 1 to 2 inches long, with wing lanceolate
and decurrent to below the middle of the seed.
Fruit Color – Light-brown to tan in color.
Growth Habit – Variable.
Texture – Medium, summer; medium-coarse, winter.
Crown Height – 35 to 65 feet.
Crown Width – 30 to 40 feet.
Bark Color – Bark is ash-gray to brownish on older branches
and furrowed into close diamond-shaped areas separated
by narrow interlacing ridges.
Root System – Roots are shallow, fibrous, and wide spread.
Soil Texture – Adapted to a wide variety of soil textures.
Soil pH – 6.0 to 8.0.
Windbreak Suitability Group – 1, 1K, 2, 2K, 3, 4, 4C, 5, 6D,
6G, 8, 9C, 9W, 9L.
USDA Zone 2.