Hello, I live in Myrtle Beach SC and I purchased this eucalyptus tree two years ago from Lowes and it was about 2 ft or less. It's now over 8 ft tall as you can see in the photos and was green just a few weeks ago. As you can see in one of the photos it has some green shoots coming out the bottom so I didn't think it was root rot. We also trimmed the limbs off the bottom and replaced the dirt around the roots with new garden soil yesterday. I had the same kind of tree that was huge and no issues when I lived in Columbia SC. Can you tell me what may be wrong with it? I called a few nurseries and they are not familiar with eucalyptus trees over here and even said it is not grown here. Thank you for any help.

By any chance do you water it by directing a stream of water or emptying a bucket right next to the base of the trunk?
If I am seeing those pictures right that's most likely the cause.

There are different kinds of Eucalytus trees, maybe the one that you have now is less tolerant of colder temperatures. That is probably why the leaves that are on the tree are turning dry, and yet closer to the ground are still green. Do you know that eucalyptus trees have a lot of oil in them and they can explode when close to fire? Koala bears think the leaves are yummy.

How long ago did the leaves turn brown? Did/do you water at the base, or did you expose the roots to look for rot? There's not much that kills them quite that fast, except frost. I have had issues with other species doing the same thing, though.
As for the oil/fire issue, that all depends on how dry they are. If well-watered they are no more explosive than any other tree. They go up like candles when they are very dry, but not in most garden situations. The ones in Australia are going through record drought and heat which makes them super flammable because they are drier than they've ever been. You do need to watch for wandering troops of Koalas, though. They can defoliate a good-sized tree in decades.

Hello, my tree was green like it has been for 2 years watering normal no extreme cold. It's the beginning of fall now. About 2-3 weeks ago we noticed all the leaves this color. They are not falling off but just changed colors. They really don't even feel that dry. Thank you for your response

Is there any wet-looking dark staining at the base of the trunk? Or a sunken scaly area? That the leaves are still flexible indicates that it died suddenly and recently. The new shoots at the bottom give hope that it will grow back. One of the few issues they have is crown rot from Phytophthora. The only prevention is to keep the base of the trunk as dry as possible, in your summer that might be a little difficult.

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