Evergreen tree turned yellow/brown

Asked October 17, 2017, 11:29 AM EDT

A few months ago the tree started yellowing and has gotten progressively more yellow/brown colored. The needles seem slightly crunchy to the touch though not totally dead feeling. Not sure what is wrong with it. There are a few patches of green but it's pretty uniform yellow color.

Clackamas County Oregon forestry

1 Response

Your tree appears to be a Port Orford cedar (Chamaecyparis lawsoniana). And based on the symptoms, it is very likely that it is afflicted with the root disease Phytophthora lateralis. Unfortunately, this introduced pathogen is deadly on Port Orford cedar, causing rapid mortality in otherwise healthy trees. For more information on the disease, see the reference in the PNW Plant Disease Handbook

Cedar, Port-Orford (Chamaecyparis lawsoniana)-Root Rot

The disease spreads via spores in water and soil particles, most often moved around by vehicles (so it is common to see it spread to trees along roads and driveways). If there are other Port Orford cedar nearby, they will likely be infected soon. Sorry.