White Ash Vs. Green Ash Trees

Overview

Ash trees are common in the landscape, especially since they grow fast. White ash and green ash are two types of ash trees available. They are similar since they are in the same genus, but do have some differences.

Definition

White ash bears the botanical name Fraxinus americana. The botanical name for green ash is Fraxinus pennsylvanica. Both are members of the Oleaceae (Olive) family.

Geography

The recommended USDA growing zones for both white ash and green ash are Zones 3 to 9A.

Leaf Scars

As Jenny Janis from Discover Life points out, the leaf scars are the key to telling these two trees apart. The green ash leaf scars are half-round while the white ash has deeply notched leaf scars.

Size

White ash grows 50 to 80 feet tall and 40 to 60 feet wide. Green ash reaches 60 to 70 feet tall and 45 to 50 feet wide.

Sun Needs

Green ash grows best in full sun. White ash can be grown in either full sun or part sun.

References

  • Discoverlife.org - Fraxinus L. Ashes
  • University of Florida - White Ash
  • University of Florida - Green Ash

Who Can Help

  • Michigan State University Extension - Ash Tree Identification Guide
Keywords: white ash, green ash, ash trees

About this Author

Marie Notnats enjoys learning about new topics and teaching people new skills. She has been writing professionally since 2008. She is a professional horticulturist with a Bachelor of Science degree in horticulture from Brigham Young University. She writes for About.com, Examiner.com, eHow, and assorted gardening blogs.