Western red cedar dieback update

The lush, towering presence of western red cedars (Thuja plicata) in Washington state has been a hallmark of the region's natural beauty and ecological health. However, these majestic trees are facing an unprecedented threat. Urban areas like Mount Vernon, Burlington and Anacortes are witnessing a troubling phenomenon: the dieback of western red cedars. Drought mitigation planning is essential in preserving this valuable resource.

Unveiling the crisis

Western red cedar dieback, primarily driven by drought and rising temperatures, is becoming increasingly common in urban landscapes. Red cedars struggle in the changing climate as environmental stressors intensify. Citizens here have noticed dieback and alerted local officials. City parks departments watch the health of the groves in Mount Vernon and Burlington and see that dieback is not yet a problem, but it occurred in Little Mountain Park only five years ago.

Historical context

To fully grasp the severity of this issue, it is essential to understand the historical significance of western red cedars. They have long been a symbol of stability and endurance. Their decline marks a significant shift, highlighting the urgent need to adapt our urban forestry practices to the realities of climate change.

Washington State University has invested substantially in the observation and study of western red cedar dieback with their Extension Forestry division. Working from the hypothesis that red cedar dieback is a result of regional drought, WSU launched Forest Health Watch to track dieback. To participate, visit ­foresthealth.org/redcedar and report dieback. Your information will help confront the threats to these giants. Access to a detailed map of citizen scientist reports is also provided. The website provides multiple links to research on identification, biology, ecology, distribution, ethnobotany and relevant pests and diseases.

Conclusion

The dieback of western red cedars is a pressing issue that demands our immediate attention. By understanding the causes, implementing practical solutions and fostering community involvement, we can take meaningful steps to protect these iconic trees. The best action today's gardeners and homeowners can take to preserve red cedars is to keep the soil around their trees weed-free, well mulched and to discourage heavy foot traffic.

Together, we can make a difference in safeguarding our urban forests' natural beauty and ecological health. Read the full Ask a Master Gardener blog post and learn more about how you can contribute to the preservation of western red cedars, at ­skagitmg.org/western-redcedars/.

Sonja Nelson is a Skagit County WSU Extension Master Gardener Class of 2009.

For questions about home gardening or becoming a master gardener: Skagit County WSU Extension Office, 11768 Westar Lane, Suite A, Burlington, WA 98233; 360-428-4270; or skagit.wsu.edu/mg.