The Internet's Finest Tropical Fruit Discussion Forum!"All discussion content within the forum reflects the views of the individual participants and does not necessarily represent the views held by the Tropical Fruit Forum as an organization."
The deficiency is a nitrogen deficiency.. The symptoms for a nitrogen deficiency in citrus are: Totally yellow leaves with no variation of color, or yellow/orange veins with some green to the sides. Note: 1 inch of irrigation either from rain or hose can leach nitrogen 1 to 2 feet down in sandy soil. A combination of low nitrogen and cool weather could also be involved.