Nutrients

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

Cauliflower - Discolouration

Symptoms
Older leaves are pale bluish green with purple discoloration. Especially the underside of leaves turns red.

Reasons
Phosphorus deficiency on leaves Nitrogen deficiency leads to red discoloration too, but in this case leaves are light green.

Cauliflower - Discolouration

Symptoms
Older leaves are pale bluish green with purple discoloration. Especially the underside of leaves turns red.

Reasons
Phosphorus deficiency on leaves Nitrogen deficiency leads to red discoloration too, but in this case leaves are light green.

Phosphorus deficiency made worse by

  • Acidic or very alkaline (calcareaus) soils
  • Low organic matter
  • Cold or wet conditions
  • Crops with a poorly developed root system
  • Soils with low P reserves
  • Soils with a high phosphate capacity
  • Iron rich soils

Phosphorus is important for

  • Early growth, especially for root development
  • Increases vigor in shorter season crops especially in adverse conditions
  • Improves marketable yield