Anyone who has it in their orchard, or at least cultivates the tree, has noticed that, in some cases, the lemon leaves yellow. This is a very common problem. First of all, because it is a much-loved tree and, therefore, very widespread. But also because it is a very delicate plant, which suffers from environmental problems, nutrient deficiencies, and diseases. And for this very reason, the reasons for the yellowing of the lemon leaves can be different. In this article we try to give a concrete answer to this frequent question, proposing the appropriate corrective actions to solve the problem…