Boron deficiency on citrus made worse by

  • Sandy soils
  • Alkaline soils
  • Soils low in organic matter
  • High levels of nitrogen
  • High levels of calcium
  • Cold wet weather
  • Periods of drought

Boron is important for

  • More uniform and vigorous vegetative growth
  • Leaves are properly formed and premature drop is avoided
  • Fruit set and development is improved
  • Fruit quality (juice/sugar levels) enhanced
  • Fruit/rind ratio improved
  • Yield increased