Why Is My Alder Tree Dying

Phytophthora disease of alder is a disease of alder trees (trees in the Alnus genus) caused by an algae-like organism called Phytophthora alni (P. alni). It is considered to be one of the most important diseases of natural ecosystems to arise in Europe in the late 20th and early 21st centuries.

What are alder trees worth?

In the first half of 2018, the market value of red alder in the Washington coast market area has averaged around $720 per mbf (1,000 board feet). Compare that to Doug fir, which has averaged about $745 this year.

Do alder trees fall easily?

It is normal far small, and even fairly large, branches to die and drop, especially in alders. Healthy trees rarely just up and fall over, but a bad storm or combination of weather events can knock even a healthy tree over.