Many of Australia’s soils are sufficient in magnesium however high yielding horticultural crops often require additional magnesium to meet plant demands. Also high potassium inputs can often create a magnesium imbalance in plants. Where high levels of potassium are being applied it is also beneficial to apply magnesium.
We use Magnesium Oxide in balanced fertililser formulations and custom blends as a slow release high grade magnesium source. Other sources of Mg are Kierserite (magnesium sulphate) which is better suited to crops that have an immediate magnesium requirement.