The Oregon Ash is the only ash tree native to the Northwest. The Oregon Ash dominates the seasonal wetlands and stream-side habitats in Western Oregon. The Oregon Ash can be identified by its leaves each with 5 to 7 oval leaflets. Since its arrival in Michigan from northeast Asia in the mid 1990s, the Emerald Ash Borer has spread across the United States and Canada killing an estimated 100 million ash trees. It was first found in Tualatin River watershed in June 2022 in Forest Grove. Those ash trees were immediately cut down and chipped. It is anticipated the Emerald Ash Borer will eventually kill most of the Tualatin River valley ash trees. The Emerald Ash Borer spreads to new areas primarily through the transport of infested firewood, ash logs, or ash trees from nurseries. Be vigilant. Do not transport ash firewood to a different location.
