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The City of Portland, Oregon

Portland Parks & Recreation

Healthy Parks, Healthy Portland

Phone: 503-823-7529

1120 SW Fifth Avenue, Portland, OR 97204

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Dutch Elm Disease Season 2015

Elm Trees


Following a particularly dry year, the City’s elms are hanging in there, but some are looking stressed. With sixteen elm samples currently being cultured in the lab and seven elm trees to be sampled, the true extent of Dutch elm disease this year remains to be seen.

So far, one right-of-way elm in the south of Eastmoreland has tested positive for Dutch elm disease. Elms in this area have tested positive for Dutch elm disease in the past. Additionally, three elms at Lovejoy Fountain, another Dutch elm disease hotspot, are scheduled to be removed soon due to severe decline and showing signs of the disease. One Heritage Dutch elm in Northwest Portland and one elm in Southwest Portland are dead or in severe decline, with removal pending. One young dead hybrid elm from the South Park Blocks has been removed.


With three major elm locations and several more individual Heritage elms receiving inoculations in June, elm inoculation season is off to a strong start. Despite this year’s high temperatures, the elms have proven to take up the inoculant more quickly and successfully than expected. Nineteen trees in

Wallace Park and trees in portions of North Park Blocks and the Plaza Blocks received inoculations by Urban Forestry Arborist Todd Keeland, with the assistance of Urban Forestry Establishers Steve Robinson, Xavier Ritchie-Martinez, Laura van Fleet, and Jess Tyler. Urban Forestry is set to inoculate a total of 125 elms this summer.

While Eastmoreland completed their elm inoculations mid-June, Save Our Elms’ inoculations in Ladd’s Addition are still pending.

Folks with any elm concerns or questions can contact Natasha Lipai, Urban Forestry’s Elm Monitor. Natasha can be reached at 503-823-8398 or at with any elm/DED-related questions.