Iron Deficiency in Grapes

Symptoms of Iron Deficiency in Grapes

Because of Iron’s immobile nature in plants, Iron deficiencies typically first appear as interveinal chlorosis of younger leaves. As the severity of the deficiency increases, chlorosis spreads to older leaves. A severe deficiency may turn the entire plant yellow to bleached white. This deficiency might be overshadowed by another nutrient deficiency or nutrient imbalance.

Iron Deficiency in Grapes

Iron Deficiency: Leaves turn completely yellow

See Additional Deficiencies:

About Iron

Iron is a catalyst to chlorophyll formation and acts as an oxygen carrier in photosynthesis. It is essential to protein synthesis, plant respiratory enzyme systems, and energy transfer. Iron deficiencies are common in many soils because of conditions or treatments that decrease Iron’s plant availability, such as pH greater than 7.0, low organic matter, cold-wet conditions, and over-liming.

Functions of Iron

  • Chlorophyll formation
  • Activator for respiration
  • Enzyme activation

Iron Deficiency is Made Worse By:

  • High pH
  • Waterlogged media
  • Calcareous conditions
  • High Copper, Manganese, Zinc