Green Ash
Fraxinus pennsylvanica

Family: Oleaceae (oh-lee-AY-see-ee) (Info)
Genus: Fraxinus (FRAK-si-nus) (Info)
Species: pennsylvanica (pen-sil-VAN-ih-kuh) (Info)
View this plant in a garden




over 40 ft. (12 m)


20-30 ft. (6-9 m)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun



Bloom Color:


Bloom Time:

Late Spring/Early Summer



Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From semi-hardwood cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Morrilton, Arkansas

Denver, Colorado

Jacksonville, Florida

Lake City, Florida

Palmetto, Florida

Indianapolis, Indiana

Benton, Kentucky

Gramercy, Louisiana

New Orleans, Louisiana

Vacherie, Louisiana

Valley Lee, Maryland

Minneapolis, Minnesota

Whitehouse Station, New Jersey

New York City, New York

Belfield, North Dakota

Cincinnati, Ohio

Hilliard, Ohio

Altamont, Oregon

Irwin, Pennsylvania

Dickson, Tennessee

Conroe, Texas

Hereford, Texas

Orem, Utah

Kinnear, Wyoming

Riverton, Wyoming

show all

Gardeners' Notes:


On Jan 10, 2009, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:

Green ash is one of the most commonly planted ash species thought there are several other species of ashes that are a bit difficult to tell apart - thus the very low numbers of reported 'have this species'. Blue ash are hard to find in the nursery trade because of their large amount of seeds produced by female trees while black ash are more of a weedy species - more leggy in appearance.

Diseases - free? No way - Green ash regularly get infected by a nonnative species of ash bug (Homoptera family) which hits every year, and when the tree is stressed, causes most of the leaves to be shed, creating new ones in mid summer. There's a gall type that hits the flower buds, leaving it brown and hanging on the branches for between one and maybe 5 years (I guess) and leaves tannin st... read more


On Jun 2, 2005, darylmitchell from Saskatoon, SK (Zone 3a) wrote:

Green ash is a favoured tree in urban landscapes because of its hardiness, adaptability and resistance to pests and diseases. It's considered a good "solar friendly" tree for energy conservation. It gives moderately dense shade in summer due to its compound leaves, and its open branch structure allows sunlight to get through in the winter. It is often the last tree to put forth leaves in spring and among the first to drop them in autumn.

Because of its good qualities, green ash is often overplanted. A new and growing threat to these trees is a non-native insect called the emerald ash borer (Agrilus planipennis). It has killed millions of ash trees in Ohio, Michigan and Indiana. It is also present in southwestern Ontario.


On Jan 21, 2005, escambiaguy from Atmore, AL (Zone 8b) wrote:

Not as colorful fall foliage as white ash. Green Ash is native to the entire southeast, but it's pretty much confined to lowlands along rivers. Very rare along the coastal plain and upland forests.


On Nov 12, 2004, melody from Benton, KY (Zone 7a) wrote:

A tree of the lowlands with compound leaves that are 10' to 12" long. It can grow quite large...60' to 70'.

Used as lumber and makes a nice suburban tree.


On Apr 9, 2004, Bemhawk from Sterling, VA wrote:

Can you really graft Chinese Wisteria to this tree? I have heard that it is easy to do, but I am uncertain whether or not it will work.


On Apr 3, 2004, riceoak from Fort McMurray
Canada wrote:

Green Ash - This tree is found on urban sites in Northern Canada (Zone 2b).