Dan wrote:
Hi all,
My Washington Navel Orange tree has started shedding its leaves.
Leaves have turned yellowish and are carpeting the ground under the
tree. I have five other citrus trees including another orange and
they seem to be unaffected. I live on the Atherton Tablelands in a
subtropical climate. Though the area sometimes gets frost I am too
high on the side of a hill to get frost except in extreme conditions,
and there has been no frosts this season so far. Does anyone have any
idea what may be the cause and, if so, what I can do about it.
Thanks,
Dan

Did you just fertilise the tree? Has it been very wet lately?

David