Potassium deficiency made worse by

  • Acidic soils (low pH)
  • Sandy or light soils (leaching)
  • Drought conditions
  • High rainfall (leaching)
  • or heavy irrigation
  • Heavy clay (illite) soils
  • Soils with low K reserves
  • Magnesium rich soils

Potassium is important for

  • New growth is healthy
  • Cold hardiness is improved
  • Flower number increases
  • Fruit are longer and are generally more intensely coloured
  • Fruit may mature earlier and have improved flavour
  • Yields are increased