Blue arrow juniper hollowing in the middle

Asked May 19, 2017, 10:16 AM EDT

Hello my blue arrow juniper, which I love very much is thinking out in the center of the plant. Tree was planted about 10 years ago. Desperate for answers and help. Thanks.

Nassau County New York

1 Response

There are many potential causes for your juniper's thinning including an insect pest or a disease, drought stress from the very dry summer we experienced last year, or a combination of a cultural problem - related to the plant's growing conditions - and an insect or disease, since plants that are stressed from a cultural problem are more susceptible to diseases and pests.

A soil test, which can be performed at your county cooperative extension office, will show whether the problem is a nutrient deficiency in the soil that can be corrected. You can find more information about the services provided by the Nassau County Cooperative Extension office here:

The following link will take you to a very informative page on the potential pest and diseases of junipers, and how to recognize and treat them:

Another home owner posted a similar question to this site, and you might find the response enlightening, since he described a problem similar to yours.

Consider having a certified arborist come and assess the tree in your yard. He/she will be able to give the tree and the conditions of the site in which it is growing a detailed examination and will suggest any necessary treatments. Most arborists do not charge for such consultations, and will only invoice you for services they provide following the initial consultation.