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Browning of Hinoki Cypress #776157
Asked October 22, 2021, 3:58 PM EDT
Lane County Oregon
Expert Response
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! SandraAsk Extension offers one-to-one expert answers from Cooperative Extension/University staff and volunteers within participating Land-Grant institutions across the United States.
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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