problems with branches/whole arborvidae trees #135849 - Ask Extension


problems with branches/whole arborvidae trees #135849

Asked June 21, 2013, 1:20 PM EDT

I have maybe 60 arborvitae trees and 4 of them are having problems. I've had the trees professionally looked at and so far spider mites have been ruled out I guess. Browning starts at the tips of needles on individual branches. It does seem to spread to neighboring branches. I would like to find the cause and the cure before more trees become involved. Although your site indicates that I might send more than one picture at a time, I have not been able to select more than one.

Marion County Oregon

Expert Response

Hello and thank you for asking about your trees. Did the professionals examine the roots and watering/drainage?
Plant diagnosis over the web is difficult, and when so many trees might be involved, I'd like to suggest you contact your county Master Gardener Volunteers. Their email will allow a few more photos and easier back & forth responses, also phone calls. Perhaps taking a branch to the office will help, but first talk with them.
Marion County, Oregon, Master Gardener Phone: 503–373-3770, Email:, Office Address: 3180 Center Street NE, Room 1316, Salem OR 97301, Master Gardener Phone and Walk-In Hours: Monday - Thursday 9 AM - 1 PM and 2PM – 5 PM (April - October)

Jacki Dougan Replied June 23, 2013, 1:36 AM EDT

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