Are my arborvitae goners?


It could be a number of things, but often the culprit is poor drainage or overwatering, which causes the roots to rot. Sometimes there is a disease at play as well, but that cannot be determined without a root sample. Overcrowding can also be a problem - if you planted them densely at first to create an instant screen and they have since grown a lot, perhaps they needed to be thinned out.

Arborvitaes need watering, but make sure that there is not water ponding up around them.

It looks like you have a cultivar of Thuja occidentalis (Eastern arborvitae) from the foliage photos. If you want to stick with an evergreen hedge, perhaps you could try a cultivar of Thuja plicata (western arborvitae) instead. It is said to be more disease resistant.

Was this page helpful?

Related Content from OSU Extension

Have a Question? Ask an Expert!

Ask an Expert is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.

Ask Us a Question