This beautiful member of the olive family is found in riparian areas, often alongside Black Cottonwood, willows and Red Alder. It is an excellent species for reclamation projects. Native to coastal Washington and Oregon and the mountain ranges of California, it is hardy to USDA zones 6-9. At full maturity, Oregon Ash reaches 40 – 80,’ with stiff branches and long axils of 5-9 small leaflets. In fall the leaves turn yellow. Oregon ash prefers full sun and a moist site but it will tolerate some shade and seasonal flooding.
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