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Browning of Hinoki Cypress #776157

Asked October 22, 2021, 3:58 PM EDT

2 Chamaecyparis obtusa gracilis were planted about 4 months ago in an area with partial shade. Since the rains began about 1 month ago, I noticed browning of many needles, near the trunk (not on the tips). I have photos but they won't upload to your form. Can you tell me if its fungal blight or insect infestation? And what to do to save the trees? Thank you! Sandra

Lane County Oregon

Expert Response

Here is a photo:  

image

On Oct 22, 2021, at 12:58 PM, Ask Extension <<personal data hidden>> wrote:


Dear sandra2wu,

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YOUR QUESTION #0046088:

Browning of Hinoki Cypress


2 Chamaecyparis obtusa gracilis were planted about 4 months ago in an area with partial shade. Since the rains began about 1 month ago, I noticed browning of many needles, near the trunk (not on the tips). I have photos but they won't upload to your form. Can you tell me if its fungal blight or insect infestation? And what to do to save the trees? Thank you! Sandra

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The Question Asker Replied October 22, 2021, 4:19 PM EDT

Too much or too little water or light can turn the plant brown, as can poor drainage and root rot. Another thing to consider is lack of iron or other nutrients in the soil. It is also susceptible to scale insects and fungal diseases. Neither of which are evident in the photos you sent. Check out this publication:

https://homeguides.sfgate.com/problem-browning-hinoki-cypress-43146.html

Chris Rusch Replied October 25, 2021, 11:27 PM EDT

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