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Urban Forestry
Arborist's Office
206-684-TREE (8733)
Street Tree Management Plan
Street Tree Planting Procedures
Permit Application to Plant a Tree
Tree Service Providers
Tree Pruning Guide
Tree Pruning / Removal Permit Request
Landscape Architecture
Seasonal Tree Care
Seasonal Information
After the Storm
Dutch Elm Diseased Trees
Tent Caterpillars
Prepare Your Trees for Winter
Utility/Tree Inspections
Heritage Tree Program
Seattle Tree Inventory
Urban Forestry Class and Resources

CITIZEN’S ALERT!! Watch for DED* Trees!

*Dutch Elm Diseased

Elm trees are among the stateliest of native American trees. Elms may be best known as the trees whose gracefully arching branches once interlaced the length of many eastern American city streets. These days, the population of elms has been decimated by a fungus called Dutch Elm Disease (DED).

The disease works by affecting the flow of water and nutrients in the tree. Fading leaves are often the first sign that something is wrong. The browning of leaves and branches, called “flagging,” becomes increasingly apparent in the summer.

Trees may be treated, and the disease slowed or halted if treatment occurs before, or soon after, flagging is spotted.

DED was first discovered in Seattle in 2001. Its presence threatens the approximately 500 American elm trees growing within the public right of way along Seattle streets and hundreds more on private land.

Citizens can assist in the fight against DED by watching for signs of flagging in elms that are in your neighborhood.

If you are interested in visiting elms in Seattle, drive down 34 th Av. E and 38th Av. E between E. Valley St. and E Madison St.

Please call SDOT Urban Forestry at 684-TREE if you have a tree to report or have additional questions.

You may also wish to visit these websites for more detailed information, visit:

Areas of Elm Trees in Seattle

If you have any questions, call 206-684-TREE (8733) for more information.
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