Answer: Desert soils are often very alkaline, which can lock up nutrients and make them unavailable to plant roots. What you describe is common for acid-loving plants. You can have your soil tested to see just what the pH is, and then correct the imbalance with applications of sulphur. Feed your jasmine with an acidified fertilizer to help keep things in balance. The white leaves won't green up; they'll fall from the plant, but should be replaced with healthy new leaves once the roots get the nutrients they crave. Best wishes with your garden!
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