rahamad, if you can supply photos of this tree and your others near it, that would be helpful. Sounds like maybe you have something going on at the roots. Possibly gopher damage. Have you checked carefully around the roots of the tree to see if there is evidence of gopher activity?

Patty S.

I doubt that there is anything wrong with your tree. When a citrus tree is in bloom, it sheds many of its older leaves that are no longer capable of producing the amount of photosynthates that they should. This is a very common time of year for citrus leaf drop. The leaf drop will soon stop, as the bloom season comes to an end.