Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulfur
B Boron
Mn Manganese
Mo Molybdenum

Melons - Necrosis

Symptoms
Young leaves are wavy. Older ones show necrotic leaf margins, the so-called 'leaf scorch', being typical for K deficiency. Brown spots spread from there towards the middle. Plant size is reduced.

Reasons
Potassium deficiency. Melons have a relatively high potassium requirement, especially until the beginning of fruit ripening.

Melons - Necrosis

Symptoms
Young leaves are wavy. Older ones show necrotic leaf margins, the so-called 'leaf scorch', being typical for K deficiency. Brown spots spread from there towards the middle. Plant size is reduced.

Reasons
Potassium deficiency. Melons have a relatively high potassium requirement, especially until the beginning of fruit ripening.

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

  • Helps to optimise leaf quality
  • Optimises plant water management
  • Potassium has been closely associated with resistance to disease in many plants
  • Improves resistance to low temperatures

Yara recommended fertilizers for Potassium

SULFATE OF POTASH - GRANULAR 0-0-50

SULFATE OF POTASH - GRANULAR 0-0-50

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