Harry writes:
Our lemon tree has lots of green fruit, but leaves are
yellowing?
Please advise what it needs.

Others have given the right advice.

If you are not able to get some trace elements quick smart, try a
couple of dessert spoonfuls of Epsom Salts in a wateringcan of water
distributed out to the dripline, then set a sprinkler to water this in
well.
--
John Savage (newsgroup email invalid; keep news replies in newsgroup)