Growing a eucalyptus is worth the extra concern that, in a hard winter, the plant could be cut almost to the ground. ... But the leaves of two other species, E. cinerea (hardy only to zone 9), ...

Q. I have a 3-year-old silver dollar eucalyptus tree about 20 feet tall. About two months ago the leaves began to turn brown. The leaves now are very brown, but when we scratch the trunk, it is green.