I have a Eureka lemon tree, about 13 years old, which had produced good and plentiful lemons most of this time, but has been slowing dying back over about 4 years now. I've tried fertilizing regularly every few months with citrus fertilizer, adding compost, and watering thoroughly every couple of weeks in dry weather. Nothing has helped even temporarily. I live in San Francisco on a south-facing hillside. The tree is in a confined space, at least 64 cubic feet in a raised bed behind a retaining wall, with excellent drainage. It has lingered on, producing green leaves that turn yellow quickly, and the branches have died back a few feet every year. Any ideas why the tree is dying? I am concerned that if I replace it with a new tree, it too will wither. Thanks, Elihu58
Do new leaves display any symptoms or do they appear healthy? Does your fertilizer contain micronutrients? Dieback is one symptom of an iron deficiency and boron toxicity. A Guide to Citrus Nutritional Deficiency and Toxicity Identification Citrus: Diseases and Disorders of Leaves and Twigs
