Nutrients

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

Tomato - Chlorosis

Symptoms
Plants deficient in Fe show chlorosis of intercostal areas of young leaves, followed by yellowing of whole shoot tips. At severe deficiency, the leaves may become nearly white, and the veins are chlorotic, too.

Reasons
Iron deficiency. Magnesium deficiency also shows chlorosis in the interveinal areas, but these symptoms start on the older leaves, and the chlorosis has a more yellow-orange colour. Manganese deficiency also shows chlorosis on younger leaves, but the veins remain green even at severe deficiency.

Tomato - Chlorosis

Symptoms
Plants deficient in Fe show chlorosis of intercostal areas of young leaves, followed by yellowing of whole shoot tips. At severe deficiency, the leaves may become nearly white, and the veins are chlorotic, too.

Reasons
Iron deficiency. Magnesium deficiency also shows chlorosis in the interveinal areas, but these symptoms start on the older leaves, and the chlorosis has a more yellow-orange colour. Manganese deficiency also shows chlorosis on younger leaves, but the veins remain green even at severe deficiency.

Iron deficiency made worse by

  • High pH
  • Water logged soils
  • Calcareous soils
  • High copper, manganese or zinc soils

Iron is important for

  • Chlorophyll formation
  • Photosynthesis
  • Protein synthesis
  • Fruit colour

Yara recommended fertilizers for Iron

YaraVita® FERRICHEL NINETY™

YaraVita® FERRICHEL NINETY™

Tomatoes (field grown): 1 to 3 lb/acre from 2 weeks after transplanting or as soon as there is sufficient leaf cover to intercept the spray. Repeat as necessary at 10 to 14 day intervals. Do not apply during flowering. Note: Final application to be made at least one month before harvest. Water rate: 20 gallons/acre.

Read more about YaraVita® FERRICHEL NINETY™