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I have a eucalyptus niphophila and its leaves have turned brown. It started around february when it was in a pot, so I replanted it in the earth. Unfortunately its still brown leaves although the leaves aren't falling off.

Any ideas whats wrong? Its apparently one of the hardiest eucalyptus trees.

http://tinyurl.com/caxhtv

Don't think I can help other than to say our two  eucalyptus trees have leaves turning brown continually throughout the year, sometimes in swathes. Fingers crossed for you it's part of their natural behaviour, perhaps while they re-establish their roots.