OVERVIEW
Iron sulphate (ferrous sulphate) fertilizers are widely used micronutrient fertilizers to correct iron (Fe) deficiency in crops. Iron is essential for chlorophyll formation, photosynthesis, enzyme activity, and respiration. Iron sulphate is especially effective in acidic to neutral soils and is commonly applied in soil, foliar, and fertigation programs.
IMPORTANCE OF IRON IN PLANT NUTRITION
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Essential for chlorophyll synthesis
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Supports photosynthesis and energy transfer
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Activates key plant enzymes
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Improves overall plant vigor and yield
Iron deficiency mainly appears as interveinal chlorosis on young leaves, since iron is an immobile nutrient in plants.
WHERE IRON SULPHATE FERTILIZERS ARE USED
FIELD CROPS
Iron sulphate is applied in:
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Wheat
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Rice
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Maize
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Barley
Purpose
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Correct iron chlorosis
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Improve leaf greenness and growth
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Support photosynthetic activity
FRUIT TREES AND ORCHARDS
Commonly used in:
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Citrus
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Apple
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Pear
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Peach
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Apricot
Benefits
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Prevents yellowing of young leaves
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Improves fruit size and quality
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Enhances tree vigor
Iron sulphate is often applied as soil treatment or foliar spray in orchards.
VEGETABLE CROPS
Used in:
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Tomato
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Potato
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Spinach
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Lettuce
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Onion
Benefits
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Rapid correction of iron deficiency
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Improved leaf color and growth
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Higher yield and quality
VINEYARDS
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Corrects iron chlorosis in grapevines
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Improves canopy development
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Supports sugar accumulation
Iron sulphate is particularly useful in vineyards with temporary iron deficiency symptoms.
ORNAMENTAL PLANTS AND TURF
Applied to:
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Lawns and turf grass
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Flowering plants
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Shrubs and landscape plants
Advantages
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Rapid greening effect
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Improves aesthetic appearance
APPLICATION METHODS OF IRON SULPHATE FERTILIZERS
SOIL APPLICATION
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Applied directly to soil near root zone
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Suitable for acidic and neutral soils
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Improves iron availability over time
Limitation
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Less effective in highly calcareous soils due to fixation
FOLIAR APPLICATION
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Iron sulphate solution sprayed on leaves
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Provides quick deficiency correction
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Used during active growth periods
Note
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Correct concentration is critical to avoid leaf burn
FERTIGATION
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Dissolved in irrigation water
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Provides uniform distribution
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Best used with controlled pH water
SOIL CONDITIONS WHERE IRON SULPHATE IS MOST EFFECTIVE
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Acidic soils
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Neutral soils
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Low organic matter soils
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Temporary iron deficiency conditions
For highly alkaline and calcareous soils, chelated iron forms are usually more effective.
ADDITIONAL USES OF IRON SULPHATE
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Soil acidification
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Moss control in turf
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Correction of sulfur deficiency
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Improvement of soil structure (indirect effect)
ADVANTAGES OF IRON SULPHATE FERTILIZERS
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Cost-effective iron source
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Rapid foliar response
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Supplies both iron and sulfur
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Easy handling and application
PRECAUTIONS
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Avoid over-application
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Do not mix with strongly alkaline products
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Apply during cool hours for foliar use
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Not suitable as a long-term solution in calcareous soils
SUMMARY
Iron sulphate fertilizers are used in field crops, orchards, vegetables, vineyards, ornamentals, and turf to correct iron deficiency and improve plant health. They are most effective in acidic to neutral soils and are commonly applied via soil, foliar, or fertigation methods. Proper application ensures greener plants, higher productivity, and improved crop quality.
