Role of Magnesium in Tomato Production

Magnesium is required for many processes including transfer of energy and protein synthesis. With 20-25 % of the plant’s total magnesium localized in the chloroplasts, it is particularly important for chlorophyll production.

Magnesium and ripening disorders

Magnesium is particularly important in ensuring even ripening of well-formed fruit, as studies in UK show.

Magnesium and fruit shape

Magnesium also influences the shape of the fruit.

General guidelines for magnesium application

A regular supply is needed throughout the life of the crop. Up to 54lb/ac of magnesium is used by a tomato crop. Magnesium uptake can be depressed by an excess of other cations, so it is important to maintain a correct balance. Particular care is needed in fertigation systems.

Magnesium at tomato growth stages
Vegetative growth Maximizes concentrations in leaf tissue prior to flowering
Flowering - fruit set Improves flowering and crop production – maximum requirements are at this stage
Fruit ripening - maturity Maximum requirements are at this stage for quality fruit production

Role of nutrients

Read about the role of other nutrients in tomato production:

Nitrogen

Phosphorus

Potassium

Calcium

Magnesium

Sulfur

Boron

Copper

Iron

Manganese

Molybdenum

Zinc

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sebastian korob
Sebastian Korob
Crop Manager, Vegetable/Berries