Mushrooms growing at the base of a large Douglas fir after the fall rains can be an early sign of root rot. Arbor Vet Tree Service sees this every autumn across Snohomish and King County, from Lake Stevens to Issaquah.
Root diseases common in western Washington, such as laminated root rot and Armillaria, weaken the roots that anchor a tree while the canopy still looks full and green. That is why some trees that fail in winter windstorms appear healthy right up until they tip over.
Not every mushroom signals a problem. An assessment looks at where the growth is, whether there is resin bleeding or soft wood at the root collar, the condition of the crown, and what the tree could strike if it failed. Veteran-owned and family-run, Arbor Vet puts safety first on every job. Catching root problems in the fall gives homeowners time to plan before the windiest months of the year.
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A real close-up of mushrooms, conks, or shelf fungus at the root collar of a large Douglas fir on an Arbor Vet job, ideally with part of the trunk in frame for scale. A wider shot of the tree showing a full green crown makes the "looks healthy" point. Authentic photos strongly outperform stock images.
Canva text suggestion: "Mushrooms at the Trunk? Look Closer" or "A Green Crown Can Hide Weak Roots"