Nutrients

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

Citrus - Chlorosis

Symptoms
Magnesium deficiency causes interveinal yellowing on older leaves first. Discoloration intensifies on leaf tips and leaf margin. These areas become completely yellow, veins included. Then chlorosis proceeds towards the petiole attachment point. Leaf base remains green for the longest time. At prolonged deficiency younger leaves are affected too.

Reasons
Magnesium deficiency on leaves of lemon. Please note that this symptom may be a sign of HLB/Citrus Greening, and not a nutrient deficiency.

Citrus - Chlorosis

Symptoms
Magnesium deficiency causes interveinal yellowing on older leaves first. The leaf margins and leaf tips are most affected. Sometimes these areas become completely yellow, veins included. Chlorosis proceeds towards the petiole attachment point. Leaf base or a margin along the midrib remains green for the longest time. At prolonged deficiency younger leaves are affected too.

Reasons
Magnesium deficiency on leaves of orange. Iron deficiency causes interveinal chlorosis too, but starts on youngest leaves. Please note that this symptom may be a sign of HLB/Citrus Greening, and not a nutrient deficiency.

Citrus - Chlorosis

Symptoms
Magnesium deficiency causes interveinal yellowing on older leaves first. The leaf margins and leaf tips are most affected. Chlorosis proceeds towards the petiole attachment point. Leaf base or a margin along the midrib remains green for the longest time. At prolonged deficiency younger leaves are affected, too. With ongoing deficiency the chlorotic areas become completely yellow, veins included.

Reasons
Magnesium deficiency on leaves of satsuma. Iron deficiency causes interveinal chlorosis too, but starts on youngest leaves. Please note that this symptom may be a sign of HLB/Citrus Greening, and not a nutrient deficiency.

Magnesium deficiency on lemon made worse by

  • Sandy soils
  • Acidic soils
  • Potassium rich soils
  • Soils receiving high potash applications
  • Cold wet periods

Magnesium is important for

  • Combats chlorosis
  • Prevents premature leaf fall
  • Gives healthier greener trees