Zinc is involved in a range of enzyme reactions similar to manganese and magnesium. It is important for the development and function of growth regulators (e.g. auxin) that influence internode elongation. It is also involved in chloroplast development.
General guidelines for zinc application
Zinc can be applied throughout the season. Applications should ensure sufficient zinc is available prior to flowering. Foliar applications are the most appropriate means of treating a deficiency. Deficiencies occur only rarely in greenhouse crops.
|Zinc at tomato growth stages
||Ensures good shoot growth
||Ensures growth is not limiting
|Flowering - fruit set
||Maximizes flower set, development and fruiting
|Fruit ripening - maturity
||Ensures even ripening