I found this on http://www.dragonoak.com/Magical-Wood-Properties.html
Loved by the fairy because of its thorns that protects fairy clearings.
Magical Properties: A mighty wand of protection and bindings. Use while working with the fairy realm. Some use this wood with spells that deal with beauty and physical appearances.
The Ash tree (Fraxinus excelsior) is one of the sacred trees of Wicca/Witchcraft revered by contemporaries and ancients alike. It is often referred to in verse by the phase "by oak, ash, and thorn," which is used as a blessing during ritual or to affirm a charge of power in spellcraft. The Druids believed that oak possessed masculine energy and the thorn feminine energy, the polarities of which were balanced and focused by ash allowing the energies to be readily tapped and directed. In folklore it was believed that the fairies could be seen and conversed with by mortals wherever the three trees grew together.
As is the case with most trees, one of the main properties and uses of the ash tree is that of protection. Of old, a staff of ash was hung over door frames to ward off malign influences, or ash leaves were scattered in the four directions to protect a house or area, or a garter made from its green bark was worn as protection against sorcerers and physic attacks.
Makes a very good wand for Healing spells and protection.
As far as i can tell, Green Ash (Fraxinus pennsylvanica) has the same properties as Common Ash (F. excelsior).