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Nutrients

Overall Pale, Nitrogen-Deficient Leaves on Lemon Tree

Commonly affects: Citrus limon (Lemon Tree)

Older leaves turn uniformly pale yellow-green, with the whole tree looking less vigorous than expected, distinct from the interveinal pattern of iron deficiency.

Potential Causes

  1. 1Nitrogen deficiency, common in citrus given their heavy feeding requirements, especially in container-grown trees with limited soil volume
  2. 2Infrequent feeding not keeping pace with the tree's nutrient demands, particularly during active growth and fruiting
  3. 3Nutrient leaching from frequent watering in fast-draining container mix

Solution Steps

  1. 1Feed regularly with a citrus-specific, nitrogen-inclusive fertiliser through the growing season
  2. 2Increase feeding frequency for container-grown trees, since nutrients leach out faster with more frequent watering
  3. 3Refresh potting mix periodically to replenish depleted nutrients
  4. 4Distinguish from iron deficiency by checking whether veins stay green (iron) or the whole leaf pales evenly (nitrogen)

Prevention Tip

Overall even paling points to nitrogen deficiency, while green veins with yellow tissue between them points to iron deficiency — the distinction guides which supplement actually helps.