Why Potassium
Choose the most suitable potassium fertiliser to strengthen crop health, support high yield potential, and sustain long-term soil fertility.
We supply two high-quality granular potassium fertilisers – Muriate of Potash (MOP) and Sulphate of Potash (SOP) – to meet the needs of a wide range of Australian farming systems. Both supply essential potassium – vital for plant water regulation, enzyme activity, photosynthesis and resilience.
As soil potassium reserves decline under intensive cropping and high-yielding pasture systems, strategic potassium application becomes increasingly important. MOP and SOP are widely used across horticulture, sugarcane, pastures, and broadacre crops to help growers:
- Maintain and build soil potassium fertility
- Improve crop vigour, stress tolerance, and quality attributes
- Optimise yield reliability in both irrigated and dryland production
- Whether you need a chloride-free option or an efficient, broadacre-ready source, our potassium fertilisers support productive, profitable, and sustainable farming outcomes.
Overview
Muriate of Potash (MOP)
Economical, reliable potassium source for broadacre and high-demand crops.
MOP (50% K) is potassium chloride (KCl) – the most economical and widely used potassium fertiliser. It provides an efficient means of supplying potassium for crops such as sugarcane, pastures, and many horticultural crops.
Best for:
Broadacre cropping, pastures, and sugarcane
Crops tolerant to chloride
Growers seeking a cost-effective potassium source
Considerations:
For chloride-sensitive crops, consider Sulphate of Potash (SOP).
Sulphate of Potash (SOP)
Premium potassium fertiliser for chloride-sensitive and high-value crops
SOP (41% K) is potassium sulphate (K₂SO₄) – a high-quality potassium source with a low salt index and no chloride content. It’s ideal for crops that are sensitive to chloride or susceptible to fertiliser burn, such as avocado, macadamia, French beans and other shallow-rooted or high-value horticultural crops.
Best for:
Chloride-sensitive crops
Shallow-rooted or high-value horticultural crops
Fertigation programs requiring soluble potassium (soluble solid form not granular form)
Crops where both potassium and sulphur are required at higher rates
Considerations:
Broadacre crops where chloride tolerance is not an issue, consider Muriate of Potash MOP
For large-scale or broadacre crops, Muriate of Potash (MOP) is a cost-effective choice.
Quality Assurance
With our Nutrient Guarantee, you can trust that our Foundational products deliver exactly what’s on the label. Routine quality control testing across our supply network ensures the specifications are met every time, providing reliable, consistent nutrition for your crops.
Do you have the information to make confident plant nutrition decisions?
Visit our Resource Centre to explore practical guides, technical resources and expert insights to support your plant nutrition decisions.
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