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Nutrient Benefits


High Zn levels can reduce the availability of:

  • Iron
  • Phosphorus


  • Stimulation
  • Nitrogen assimilation


  • Formation of chlorophyll
  • Uptake and use of water in plants
  • Zinc influences the rate of seed and stalk maturation
  • Involved in several enzyme systems, growth hormone auxins, and synthesis of nucleic acids

Deficiency Symptoms

  • Stunted growth
  • Reduced size of leaves, misshapen leaves
  • Chlorosis, leading to necrosis and premature leaf fall
  • Chlorotic leaves and dieback in citrus
  • Rosetting and/or “little leaf” in fruit trees
  • “Tram lining” in corn (light striping on both side of midrib)
  • Bronze spotting on older leaves later giving a mottled appearance in legumes
  • Reduced development and size of fruit

Factors Affecting Availability

  • Soils evolved from parent material low in Zn
  • High pH soils
  • Heavily limed soils
  • Soils with high Mg levels
  • Soils high in organic matter
  • Soils high in K
  • Soils that have been levelled, exposing the sub soils
  • Soils that have had high N input
  • Cold, wet conditions (availability can be delayed at spring time)

Sensitive Crops

  • Cereals, cotton, fruit, citrus trees, nuts, oil seed crops, pome fruit, rice, stone fruit, vegetables, pulses


The following OMEX products can assist with addressing and correcting Zinc deficiency:

Visual Guide