Calcium deficiency made worse by

  • Acidic soils
  • Sandy or light soils (leaching)
  • Acid peat soils
  • Soils rich in sodium
  • Soils rich in aluminium
  • Drought conditions
  • Fruit high in nitrogen or potassium
  • Large fruit

Calcium is important for

  • Improved berry quality
  • Reduction of grape stalk necrosis
  • Improved berry firmness and storage potential

Yara recommended fertilizers for Calcium



Grapevines: A minimum of three applications, 7-10 l/ha, starting at 4mm berry size and repeating at 10-14 days intervals; treat again at berry colouring. Water rate: 500-1,000 l/ha.

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