Chlorosis occurs at all times of the year but is most common and severe in the late summer when high temperatures and dry air result in the need for heavy irrigation and in winter due to low soil temperatures, and root inactivity. Brown spots on leaves or whole leaf dry. Often leaves fall off. Iron deficiency symptoms are similar in appearance to the symptoms of deficiencies of Nitrogen, Manganese or Zinc. However, Iron deficiencies appear on new leaves where Nitrogen appear on older leaves.
Zinc deficiencies look like iron deficiencies but the leaves are much smaller than normal.
There is almost always iron in the soil, but it may be in insoluble forms that are unavailable to the plant. Iron Chlorosis can be induced with wet soils keeping the oxygen levels low. Iron absorption by roots requires an active oxygen transfer and the less oxygen the less iron can be absorbed. Infrequent, deep watering will prevent the problem Select native plants adapted to our soil conditions Reduce irrigation to the amount necessary to keep the plant in good condition. This is often sufficient to correct the problem.