Role of Nutrients by Potato Growth Stage

Find out which nutrients are most important at different growth stages.


  • Nitrogen and Potassium - early growth and dry matter
  • Phosphate - more tubers, growth and dry matter
  • Magnesium - for plant development
  • Zinc and Manganese - Powdery and Common Scab control
  • Sulphur - Common and Powdery Scab and tuber numbers

Before tuber initiation/hook stage

  • Phosphate - more tubers, stronger growth


Tuber initiation

  • Phosphate and Magnesium - bigger tubers
  • Zinc and Manganese – skin finish
  • Calcium (+/- Boron) – good skin quality, internal rust spot reduction, stress tolerance – drought/heat

Flowering and bulking

  • Nitrogen, Phosphate and Magnesium - maintain tuber growth
  • Calcium – improves skin finish and reduces disease impact