Eucalyptus Tree
Q.

Sick Eucalyptus Tree

Anonymous added on August 14, 2013 | Answered

I have 3 Coolibah eucalyptus trees in my backyard, all approximately 25 ft tall and 20 or more years old. One of the trees has suddenly changed dramatically. There are barely any green leaves, and it looks as if it has died. The other two trees are in close proximity (about 10 feet apart) yet are green and look fine. I don't know how to save it or why only one tree is 'sick'. I have inspected it for signs of bugs and have found no evidence of such. My only guess is that it has gotten a lot more water than the other two due to surrounding landscape changes.

A.
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AnnsGreeneHaus
Answered on August 15, 2013

If landscape changes occurred shortly before your tree started looking stressed, that indeed, may be the problem. However, if the other 2 trees are within 10 feet, they should be affected as well. I've attached an article discussing eucalyptus problems: https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/eucalyptus-tree-problems.htm
Hopefully it will help.

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