The Q&A Archives: Eureka Lemon

Question: we have purchased a lemon tree and it has some leaves that are turning yellow, what is going on?

Answer: Yellowing and leaf drop is a common occurence on citrus in late winter/early spring as new growth begins and replaces older leaves. Otherwise, yellow leaves can be caused by many things including lack of nitrogen, insufficient light, water-logged soil (plant roots need oxygen to thrive), dry soil, or iron deficiency. If the older bottom leaves are yellow, but new growth is green, it's usually a lack of nitrogen. If new leaves are yellow, with green veins, it's usually a lack of iron. (Lack of nitrogen is a more common problem than lack of iron.) Soil should be kept moderately moist (but not wet). Finally, transplant shock can contribute to yellowing.

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