Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
B Boron
Fe Iron
Mn Manganese
Zn Zinc

Wine Grape - Discolouration

Symptoms
Starting on the tips grapes turn brown and dry out.

Reasons
Calcium deficiency

Wine Grape - Discolouration

Symptoms
Low calcium concentrations produce brown discoloration and rotting starting on the tips of grapes. Subsequently grapes dry out.

Reasons
Calcium deficiency (upper row)

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

YaraLiva NITRABOR

YaraLiva NITRABOR

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Read more about YaraLiva NITRABOR

YaraTera CALCINIT

YaraTera CALCINIT

Grapevines: For high quality yields apply YaraLiva Calcinit three times: First application : 12.5 kg/acre (0.35 kg/day/acre) from 6-40 days after pruning; Second application : 25 kg/acre (0.6 kg/day/acre) from 40-80 days after pruning; Third application : 25 kg/acre (0.8kg/day/acre) from 80-110 days after pruning.

Read more about YaraTera CALCINIT