Nutrients

K Potassium
Mg Magnesium
B Boron
Cu Copper
Fe Iron

Plums - Chlorosis

Symptoms
Older leaves turn dark green and then progress to a yellowish green to yellow between the veins. Severely affected plants show leaf scorch along the margin. Leaves may have 'wavy' margins and drop off.

Reasons
Copper deficiency Deficiency is rare in stone fruit because of widespread use of copper sprays to correct diseases such as bacterial cancer.

Copper deficiency made worse by

  • Organic soils
  • Chalky soils
  • Sandy soils
  • Reclaimed heathland
  • High nitrogen applications

Copper is important for

  • New growth is vigorous and healthy
  • Pre-mature leaf fall does not occur
  • Yield maybe increased